|Name|| Rimuru Tempest|
Satoru Mikami (formerly)
Storm Crest (formerly)
Great Demon Lord's Blessing
King of Tempest
Newbie (New Star/New Face)
One who leads Demons
One who commands Monsters
|Gender||Androgynous (identify as male)|
Ultimate Slime (Viscous Dragonoid Demon God)
|Rank||SSS+ (True Demon Lord)|
Freedom Academy (formerly)
Eight Star Demon Lords
King of Tempest
S Class Homeroom Teacher (temporarily)
Now govern The Eastern Empires Territory
|Web Novel Debut||Prologue|
|Manga Debut||Chapter 1|
"Great Demon Lord" Rimuru Tempest ["大魔王" リムル・テンペスト, "Dai Maou" Rimuru Tenpesuto], formerly known as Mikami Satoru (三条 悟), is the main protagonist of Tensei Shitara Slime Datta Ken. He is the founder and King of the monster country Tempest of the Great Jura Forest and is regarded as one of the strongest Demon Lords among the Mighty Eight Star Demon Lords as well as the only known Great Demon Lord currently. He is also a partner and best friend of True Dragon Veldora Tempest.
He is also known as Sensei to his former students.
He has a carefree personality. After becoming a king and experiencing the reality of his close friend's death, his naïve nature decreased. Unlike most other shounen MC, he has no problem with decimating any forces who dares to harm his subordinates and country, regardless of their numbers. As he progressed through the year, his thinking has become more like a True Demon Lord.
Rimuru also tends to "overeact" when there's danger to his close ones, such as his countrymen, subordinates, friends and students.
Rimuru appears initially as a pure blue bodied slime, but upon becoming a Demon Slime, he is silver with streaks of gold. His mass has grown over time, accommodating larger human forms. initially, he only had enough mass to appear as a child normally, but by the time he became an Ultimate Slime, he had enough mass to appear as a 16 year old teen.
He can use fire state in his slime form. Upon activating that skill, his aura becomes that of a flame. His facial temperature also raises to over 1400 degrees. It can be used as a weapon. The spider's mimicry gives him white spots. As for centipede's mimicry, he grows fangs. With the lizard, he grows scales. As for the giant bat, he sprouted demon-like wings. As the black wolf, he turned black and grew two horns - horns like those of a unicorn. As a black snake, his body is covered in a gold pattern.
Mimesis: Human Edit
In this form, Rimuru possesses silver hair. There is no visible sex characteristics, however, the features are similar to that of a girl. This is probably because the original body was Shizue Izawa's. His gender is nowhere to be seen, but there are dangerously cute features.
This form doesn’t use black fog, because the slime body is equal in mass to the mass of the body formed. There is no discomfort. Also, because there's no need for black fog, there is no need to consume magic power.
Due to the fact that there are limbs now, there are improvements in motor abilities, but the body originally was that of a child though It’s still easier to move than slime. It is also possible for the mimicry to become adult using the black fog.
This form has no excretion and reproductive organs, given that there isn’t a need to excrete or reproduce, however, he is free to eat, taste and drink. Since he doesn’t need to breathe, he doesn’t do it even as a human. He could create lungs if he wanted to, but since he doesn’t see a need to, he hasn’t made them. He often wears Shizu's old mask to hide his demonic power.
In his human form, he wears a black fur coat and is depicted wearing a scarf. Under the coat, he wears the kimono that Shuna had made for him. Underneath that, he wears the pants he previously received as well as a steel thread underwear.
Since eating the Orc Disaster, his human form grew a bit. He was no longer a child, but a young human body that still retains a facial image resembling that of a girl. In that form,he is around 150 cm in height. In addition, he obtained a devil transformation form.
Upon becoming a True Demon Lord, and having his race change to Demon Slime, Rimuru has been depicted wearing a black overcoat, his nails also appear sharper and his overall human form appears slightly older.
Upon evolving further into an Ultimate Slime, Rimuru's human form looks like a 16-17 year old. This form is described by Velgurind as appearing genderless, as it was unclothed upon generation, but has dangerously cute features to it. By simply willing it, Rimuru can generate clothes from his own mass and magic power in this form.
Mikami Satoru worked at a major contracting firm and had never had a girlfriend. When meeting up with his junior, Tamura, Mikami took a criminal/robber’s blade aimed at Tamura. As he laid dying, his thoughts and strong regrets triggered the acquisition of six resistance skills and his two fundamental Unique Skills, Predator and Great Sage. And as he unknowingly wished for a body with no blood he was reincarnated into a slime.
Once reincarnated, he wakes up to find that he has reincarnated as a slime, which takes some getting used to. As slimes don’t sleep, can't see and only have the sense of touch, he eats nearby grass to pass the time. After 90 days of boredom, the skill Great Sage finally finishes integrating and things start to pick up. It turns out the grass he ate out of boredom is actually Hipokte grass, a material for high grade health restorative potions.
In the cave, he finally meets another life form, Storm Dragon Veldora. The "Great" Storm Dragon Veldora not only proves to be a bashful friend, but also teaches him how to perceive the surroundings via magical energy by the use of the skill Magic Perception. Veldora also reminisces about the peerless beauty of a Hero that defeated him 300 years ago...the two friends then name each other. Veldora becomes Veldora Tempest, and our protagonist is then named as Rimuru Tempest. To break the unbreakable Endless Prison, they agree to stake Veldora’s freedom on Rimuru’s Unique Skills, and Veldora gets stored in Predator’s storage space, stuck in time and undergoing Great Sage’s analysis.
With a new goal in mind and friend in heart, Rimuru eventually gets out of the cave. It was only after using the Great Sage’s mapping function that he succeeded though. During the 30 days after meeting Veldora, Rimuru eats more grass and rocks, namely Hipokte grass and Magic Ore, as well as other monsters that he fights and kills, and develops some personal fighting skills to defend himself.
Whilst exploring the forest outside the cave, Rimuru plays around with a sound-emitting skill acquired from predating a cave bat, and achieves speech. He meets a group of Goblins and gets invited to their village. It turns out the Goblins are being threatened by a pack of Fang Wolves. After hearing the situation from the village chief and being promised eternal loyalty, the good-natured Rimuru helps them, defeats the wolf pack’s leader, and somehow acquires the rest of the pack as subordinates. He tells the goblins and wolves to get along with each other, and thus the new village is born under his rule.
In the fantasy world, most monsters are nameless, with only high-magic power beings being able to bestow names on others. When Rimuru realizes that there is no convenient way to get their attention beyond ‘Oi, you! No, not you, the one next to you, yes you!’ he names them all. Among them, the village chief is named Rigurdo, the chief’s son is named Rigur, the new wolf leader is named Ranga, and a natural bloke goblin is named Gobuta, who later becomes a remarkable figure among Rimuru's top retainers. All the named monsters evolve, becoming stronger, but they no longer fit their clothes or their door frames, so Rimuru, along with Gobuta, Rigur, Ranga and a group of Hobgoblins and Storm Fanged Wolves, go to the Dwarf’s kingdom to acquire clothes and a skilled house builder.
Rimuru, after some misunderstandings, helps out a masterful blacksmith, Kaijin to fill his quota on swords per the King’s request. It turns out the Magic Ore Rimuru ate in the Cave of the Seal is a high class smithing material. In return for helping him out, Kaijin promises to procure Rimuru a good blacksmith, and Rimuru offers to help Kaijin’s friends, Garm, Doldo and Mild are very skilled at their crafts but bad at business. However, a certain Minister Bester ruins this, and Kaijin, after delivering his quota, is exiled from the country along with Rimuru and three dwarves brothers. The four dwarves, Rimuru and company then return to the village.
Upon returning, some other Goblins' villages join Rimuru's new village after hearing of his grandeur. Rimuru names and evolves them afterward. The dwarfs and hobgoblins immediately start working on building housing. As they are constructing the new town, Rimuru meets three adventurers who are surveying the land in front of Veldora’s cave on the Freedom Association Branch in the small country Brumund’s behalf. The adventurers are a happy bunch. A person accompanying the trio loses control of an inner flame spirit shortly after meeting Rimuru, and it’s up to Rimuru to stop it. After settling the situation, Rimuru sends off the adventurer trio. Shizue, the flame spirit’s possessor, is a World Traveler, originally from Japan. She was summoned by Demon Lord Leon Cromwell, and asks Rimuru to take up her revenge and help her student while she becomes a part of his strength, which he accepts.
After absorbing Shizue, Rimuru can now transform into a human - a beautifully androgenous human, with an alterable age. Other key abilities acquired from absorbing Shizue and Ifrit include cloning, Fire manipulation, and a new Unique skill Shapeshifter.
Forest Disturbance Arc
Life in the Royal Capital Arc
Birth of a Demon Lord Arc
Saint Demon Confrontation Arc
Founding the Demon Capital Arc
The arc began with meetings of the chiefs of the tribes in the Jura forest with Rimuru in order to pledge alligance. Rimuru also handled the issue with slavery of the elves and started planning on the dungeon together with Ramiris and Veldora.
When Rimuru hosted a festival in tempest, when he holded a tournament for his subordinates, in order to determine the ranking of them below Rimuru. Rimuru used the festival and the tournament to intruduce his new country to the world, hosting many political and economical powers for increasing the power of his country. During the tournament, Diablo, Benimaru, Gobuta and Shion ended up as the four strongest fighter and were called the four heavenly kings by Rimuru. Rimuru also intrduced the Labyrinth to the adventurers, which, despite small problems in the beginning, was a huge success.
Demon Lords' Gambit Arc
Empire's Invasion Arc
During the Empire's invasion, he stayed in the command center most of the time. Besides of setting up a surveillance system, he took almost no action during the war. Even though he wanted to use his power to ensure the safety of his people, Benimaru advised against it because he wanted to prove to Rimuru that they can protect their country and their lord by themselves. After Diablo massacred the remaining enemy, Rimuru performed a ritual to revive most of the Empire's invading force. Even though he called this revival temporary, the revived soldier can live their lives like normal. However they would never able to use any Skill and magic usage will be quite laborious and at worst they will unable to cast any magic for the rest of their life, Rimuru also put a curse on the soldiers to ensure they can never attack Tempest. Every souls were reaped and collected inside Rimuru's Gluttonius King Beelzebub's pouch. After the first battle of this war Raphael told him "Would you like to grant 100,000 souls to said subordinates list. These souls would grant a Demon lord evolution. The one sided decimation of the Empire's forces and subsequent revival has earned Rimuru the worship of many Empire soldiers (even Khrishna, the Royal Knight, has considered Rimuru his God.)
Ryuma Clash Arc
After he revived the soldiers with about 10,000 souls, He used the remaining to start the Evolution ceremony. He grants several of his subordinates demon lord evolution, some evolved immediately along with their subordinates, and some seemed to require time to complete their evolutions. Soon after, Guy Crimson arrived and asked why he felt so many demon lord evolutions at once to which Rimuru(wanting to avoid additional conflict) flatly explained it was due to his Ultimate Skill "Gluttonous King Beelzebub" (the only one he has revealed to others seeing as they can only see he has one but not how many). As per Guy's request, he evolved two of his subordinates and taught them how to make cakes. Velzard, Veldora's elder sister, arrived after Guy causing Veldora to fly away to "help Ruminas". After Veldora got dominated by the Emperor's ultimate ability, Rimuru felt the Soul Corridor detached and flew into a rage while teleporting in front of Velgrynd, the Emperor, and the airships containing the Beast corps.Rimuru summoned the Black Numbers to defeat the rest of the army and to expose the Emperor, while he fought the dragons. Rimuru consumed Veldora's body, after being told that Veldora detached his Soul Corridor to save Rimuru and was safe. Raphael reattached the Soul Corridor and began an evolution for both Veldora and Rimuru. Rimuru became the 5th “True Dragon” - the Ultimate Slime (Viscous Dragonoid Demon God).
He then chased after Vega, Yuuki's subordinate, where he faced off against the revived Yuuki. Yuuki's influence on the King then resulted in Armageddon being activated and the army of angels being summoned. Yuuki then took Justice King Michael from Rudra. The angels then possessed 1 million humans and took physical forms. In the process, he awakened Angra Mainyu who dwelled within Yuuki and became Velda, the being that was created from the remnants of Veldanava. Velda then told Rimuru that the war between angels and demons would begin in a month. He then retreated to the Heavens.
After this, Rimuru took control over the Eastern Empires.
Tenma War Arc
The Tenma war begins and 200.000 angels are sent to each Demon King (Lord) with 400.000 being sent to fight Rimuru. However, Dagruel betrays them. The Manas possessing Lucia's body is sent to Mirimu where they begin fighting. However, due to Lucia's Castle Guard, Mirimu is unable to win. In fear that Mirimu might lose control and get dominated, Rimuru, Diablo, and the higher ups of the Black Corps head to assist them. Testarossa, Carrera, and Ultima easily defeat the Seraphim. Gobuta and Karion defeat the Vega that is armed with Ultimate Skill Evil Dragon Lord Azi Dahaka. Carrera kills Vega after he escapes. Mirimu and Rimuru pretend to fight and Mirimu later pretends to get dominated by Lucia to infiltrate Velda's side. Rimuru also pretends to get killed.
Later in the Holy City of Ruberios Shion and her troops and Adalman Albert and their troops assist Luminas in her fight against the angels and Dagruel's forces. With the help of Luminas and Veldora, Shion acquires Ultimate Skill Violence King Susanoo. Veldora activates a powerful magic that destroys the army and defeats Dagruel, however it also turns Luminas' country into a thriving forest, destroying her city again. Luminas hates Veldora more.
In side El Dorado, Guy assists Leon by sending high level demons to fuse with Leon's strongest knights. The majority of the attacking angels cannot get inside, however, Kazaream and her greatest subordinates Fatman, Tia, and Laplace infiltrate. They are extremely powerful and Leon's group does their best to hold off until reinforcements arrive in the form of Souei and Benimaru.
Souei knocks Fatman out in the beginning of the battle. 1 hit KO. Benimaru defeats Kazaream in a difficult battle while Laplace Tia and Souei fight. It is revealed that Kazaream was manipulated by Velda when Velda descends and takes his power back. Tia and Laplace join forces with Souei and co to defeat them. Vega's Ultimate Skill is granted to Fatman. The fighting ends when Rimuru and Diablo arrive in search of Yuuki and kills Fatman. Yuuki and Tia join them.
Chloe and Guy continue fighting. Manipulated by Velda, Velzado gains ultimate Skill and fights. Velgrynd joins Guy. Chloe Velzado and Velgrynd get manipulated by Lucia through the connection of possession of Virtue angel series ultimate skills. Ciel helps Velgrynd by evolving charity king into Flame god 9:!67!? Velzado breaks free. It is found that Chloe possesses several elements of virtue, including the separate form of Justice. Lucia retreats and seeks Mirim's help. However, it was found Mirimu was not on their side. Lucia loses Justice king Michael due to the paradox of possessing absolute defense and offense. Mirimu kills Lucia.
Velda discovers Rimuru's still alive and focuses all angels on Tempest. He, Zero, Dino and dino's fallen angels and co infiltrate the labrynth. Zero uses the complete form of Azi Dahaka to control the labrynth. Grows mad after being defeated by Zegion and becomes a Dragon Seed Frightful Dragon and rampages. Dino and his fallen angels join rimuru. Dino reveals his dual sword skills that surpass all and the form a tetragram magic attack that annihilated Zero. Gaia, Mirimu's pet dragon, becomes a Dragon seed and is named Velgaia by Rimuru.
Rimuru, Guy Chloe, Mirimu fight Velda. Defeats. Yuuki appears with Velda's full power. Rimuru kills Yuuki and awakens Origin Magic, Instantaneous Movement. All is happy.
Rimuru's elegant escape
Many years passed and technology is high. many schools. Rimuru infiltrates in search of corruption. puts down. Comes back and finds Shion and Shuna tore his main body in two.
Veldora and Ramiris travel to another world. Beretta is dragged along. World is highly developed with cyborgs and super robots and no magic. After large nuclear war due to excessive population. Joins resistance. Emperor betrayed. Tetra Rex ultimate device using multi nuclear bombs. Institute developing infinite energy goes haywire and world is threatened by destruction. Rimuru appears and saves them. World is still being destroyed by large pollution and super beasts mutant humans. Veldora reveals true form and erases pollution and restores earth with same spell as used in Luminas' kingdom. Ramirisu awakens sleeping great spirit in planet and revives the earth. Rimuru is worshipped as a god.
Varios exploits of Rimuru during his time shortly after awakening as a demon king as he explores the wonders and nudity of the onsen.
Using Great Sage, he can quickly read a book by copying it completely. Simultaneous utilization of Great Sage and Gluttony allow the high speed copy and review of the magic books that he holds in his hands. With that, he can postpone checking the content of the book for a later time. Unfortunately, it is not possible to be able to use magic just by copying the books. But, taking and copying it, he’s able to make the index of the magic books that he wants. After this, it’s necessary for him to study them one by one. Taking that into consideration, it can be said that Rimuru holds a great amount of knowledge regarding magic as well as being speculated to be able to use most of the magic in those books, if not all of them.
After evolving into a Demon Slime, the ability to freely change between material and spiritual bodies was added. As the result of the evolution, his total magical energy greatly increased. Compared to the original amount, it was ten times as large.
He can use skills that don’t rely on magical energy such as raising his abilities using fighting spirit technique with Herculean Strength in addition.
Thanks to Hakurou’s guidance, his skills with the sword was improved.
He was able to analyze the Summoning Magic he first saw during the adventurer exam and acquired the skill to use them.
After fighting the Guardian of the Labyrinth, Rimuru has the ability to create golems. The abilities of the Golem can be added through the possession a spirit or a demon as Rimuru made them inhabit the Golem. The outward appearance of the golem is created according to his imagination.
Using Manas: Ciel, Rimuru can copy space manipulation techniques simply by seeing it, such as when he copied the Unique Skill Restrainer which belonged to Gozurl. Like this, Rimuru can also copy practically any other Skill or Magic as long as he has seem it.
After the fight with Yuuki, Rimuru gained the ability to use [Instantaneous Movement] which lets him travel across Space-Time at will. Using this ability, Rimuru was able to travel to his old world where he saved his past self Mikami Satoru from death. He was also able to return from the place beyond time where he was exiled to by Yuuki. The ability as described is the ability to reach the desired point instantly across space and time.
- True Dragon Species Magic
- Upper tier Spirit Summoning
- Upper tier Demon Summoning
- Nuclear Strike Magic
- Thought Battle Magic
- Physics Magic
- Flight Magic
- Cleaning Magic: He learned it from Ellen. When he uses it, his magic amplifies the effects of the spell, cleaning everyone in the vicinity.
- Magic Energy Manipulation Archive
- Original Magic
- Decomposition Absorption
- Endless Regeneration
- Manas: Ciel (God's Wisdom Core) [ Wisdom Lord Raphael's core that obtained individuality.]
- Thought Acceleration
- Analysis expert
- Parallel processing
- Chant Annulment
- All of creation
- Food chain, etc and Harem Skill
- Void God Azathoth
- Soul Consumption
- Turn Null (Nothingness collapse)
- Imaginary Room
- Space Time Control
- Multidimensional Barrier
- True Dragon Release
- True Dragon Core Transformation
- Multi-existence (obtain after analyzing Evil Dragon Lord Azi Dahaka)
- Harvest Lord Shub Niggurath
- Skill Creation
- Skill Duplication
- Skill Gifting
- Skill Bank
Former Ultimate Skills Edit
- Gluttonous King Beelzebuth (Synthesized to create Void God Azathoth)
- All of creation
- Food Chain
- Soul Eater
- Wisdom Lord Raphael (Synthesized to create Void God Azathoth)
- Thought acceleration
- Parallel processing/Analysis
- Chant Annulment
- All of creation
- Though: Analysis and Judgement
- Storm King Veldora (Synthesized to create Void God Azathoth)
- Storm Dragon Summon
- Storm Dragon Release
- Storm Dragon Magic Archive
- Bladed Storm: Crystalization
- Scorch King Velgrynd (Synthesized to create Void God Azathoth)
- Scorch Dragon Summon
- Scorch Dragon Release
- Scorch Dragon Magic Archive
- Bladed Flame(Scorch): Crystalization?
- Covenant King Uriel (disappeared after creating Harvest Lord Shub Niggurath and Void God Azathoth)
- Spatial Domination
- Defense Barrier
- Infinite Prison
- Seclude Space
Former Unique Skills Edit
- Great Sage (evolved into ultimate skill Wisdom Lord Raphael)
- Predator (evolved into Gluttony after absorbing Starving Ones)
- Gluttony (integrated with unique skill Heartless One then evolved into ultimate skill Gluttonous King Beelzebuth)
- Heartless Ones (integrated with unique skill Gluttony then evolved into ultimate skill Gluttonous King Beelzebuth)
- Endless Prison (evolved into ultimate skill Covenant King Uriel)
- Shapeshifter(integrated with unique skill Great Sage then evolved into ultimate skill Wisdom Lord Raphael)
- Sage (evolved into unique skill Great Sage)
- Water Manipulation
- Segmenting (disappeared)
- Black Flame (disappeared)
- Black Lightning (disappeared)
- Barrier (evolved into Multiple Barrier)
- Shadow Step (evolved into Spatial Transfer)
- Spatial Transfer
- Multiple Barrier (become irrelevant and disappeared after gain Ultimate Skill)
- Magic Perception (disappeared after gaining Universal Perception)
- Universal Perception
- Universal Body Transformation
- Great Demon Lord's Haki
- Thread Manipulation
- Cloning: For Rimuru, the Cloning skill is only limited as far as his Unique skills allow.
- First, Great Sage: As long as the user is within a kilometer radius, a clone can be created. Should he go beyond that limit, his consciousness link with the clone will be severed, and the clone can only respond to basic commands. Since vision is always shared, and an order can be changed at any time, the clone can be used for long range reconnaissance missions.
- Second, Predator. The stomach can only release the true body. A clone can be predated and stored, but cannot be extracted. However, feedback regarding skills, etc. can be acquired.
- Third, Shapeshifter: Only one fusion is allowed while division is unchanged.
- Chaos Breath
- Law Manipulation
- Element Alteration
- Telepathy Control
- Demon Lord Transformation
- Future Attack Prediction (Clairvoyance)
- Holy Sword Technique: Melt Slash
- Hydraulic Propulsion (evolves into Extra Skill Water Manipulation)
- Water Current Control (evolves into Extra Skill Water Manipulation)
- Water Blade (evolves into Extra Skill Water Manipulation)
- Flame Giant
- Star Wolf
- Black Serpent
- Acquired Skills: Heat Detection, Noxious Breath
- Acquired Skill: Body Armor
- Giant Spider
- Acquired Skills: Sticky Thread, Steel Threat
- Giant Bat
- Acquired Skill: Ultrasound Waves
- Acquired Skill: Paralysis Breath
When a certain amount of damage accumulates, the mimicry wears off. Afterwards, there is no damage transfers to his slime body. Because the skill Mimesis utilizes Magic Essence to create a new body, the main body cannot be damaged. There are two restrictions on this skill. After Mimesis wears off, he is unable to transform for the next 3 minutes, and the other was that mimicking a demon/monster required a certain amount of magic essence. The amount of magic essence required is relatively insignificant, hence, it is not an issue, and there is no duration limit to the skill. The reason for black fog when mimicking into monsters is to compensate for the missing parts.
- Physical Attack Nullification
- Natural Elements Nullification
- Abnormal Status Nullification
- Mental Attack Nullification
- Hybrid Attack Resistance
A magic mask left by Shizue Izawa. As it's name implies, it suppress demonic power. It also serves as a treasured memento of Shizue, as it is the only remaining possession of Shizue which Rimuru possesses.
- Dark Leather Guards
He received dark leather guards from Garm.
It is made of glossy linen - first-class silk that feels wonderful to the touch. Putting the silk to his body, it immediately changes size to fit him. After mixing with his magic, it became as if a part of his body. Even in his adult form, the clothing grows appropriately. This clothing absorbs the aura of its wearer, and can change its appearance. Rimuru’s clothing turned jet black to match his aura. Even if this clothing rips, as long as it absorbs his magical energy, it can repair itself.
- Wolf Outerwear
The materials used came from the previous Fanged Wolf leader. But, due to the wolf clan’s evolution, the fur had turned black. As an extra bonus, it seems that the fur had quite some magical energy stored in it. It has tremendous defense power. This attire happened to have become a magic item. It will always perfectly fit the one who wears it. In other words, even if Rimuru turns into his adult version, the clothing won’t rip.
Rimuru equipped with a demon sword a Magic Swords a high-purity Demon Steel weapons inserted with high-purity magic stones/gems he created a sword using Bladed Storm Crystalization and Bladed Flame(Scorch): Crystalization from Void God Azathoth call the sword of tempest.
In Manga and Light Novel Rimuru's personality is a kind hearted, naive and Pervert.
he along w/ Shuna and Shion are voted as the three major idols of the monster country, Tempest.