The Lich
The Lich King
The Lich
Name The Lich
Gender Male
Species Lich
Introduced In "His Hero"
Latest Appearance "Billy vs The Lich"
Voiced by Ron Perlman

The Lich (formerly known as the Lich King) is a powerful necrotic creature and a major antagonist in Adventure Time. His first appearance is in "His Hero" during a flashback about the adventures of the great hero Billy. In "Mortal Folly" and "Mortal Recoil," he possesses and nearly kills Princess Bubblegum. The episode "His Hero" showed that Billy cast him down, and "Mortal Folly" shows that he was ultimately imprisoned in a large glob of amber in the ancient tree that serves as the castle of the Candy Kingdom after being freed by a possesed Snail . After being defeated again in "Mortal Recoil," The Lich continued to inhabit the body of the waving Snail, who appears in every episode. In the episode "The Lich," he killed Billy and wore his skin to trick Finn into helping him to unlock the true secret of the Enchiridion. This was confirmed by Prismo in "Finn the Human." The Lich was last seen in the episode "Jake the Dog."


His first design had a more flattened, simplified look with larger eyes, upward-pointing horns and a different crown and robe. The design used in the series has a helm with curled horns, one of which has broken off, horrific green lights as pupils peering out of his empty eye sockets, and pale undead skin pulled tight against his nose-less skull. His skin is frayed away from his lips revealing a wicked and perpetual grin. His robe is in multiple layers and is large and baggy showing that The Lich may have woven it himself unevenly. He has a large cape that is severely torn at its end. His arms are bare bones with various decayed tissues, and his skeletal hands burn with an eerie fire when he casts fire spells. The Lich is also remarkably large. In the flashback in "His Hero," The Lich was shown to be almost as large as Billy. Before The Lich was struck down by Billy, both of his horns are intact, so it is possible that it got broken off sometime during or after the fight. He also has intact horns in Princess Bubblegum's vision.


Immortality: The Lich cannot die and has lived for over a thousand years.

Unholy Powers/Dark Magic: Aside from his immortality, The Lich has a medley of unholy powers, most prominently the flames he generates around his hands that he fires at his opponents.

  • Mind Control: Early on in "Mortal Folly," it was revealed that The Lich has the power to control people's minds, either through telepathy or spoken commands.
  • Telepathy: He is also capable of getting inside other people's mind, like he does with Finn when this one loses his geme.
  • Rot Inducement: Later in the episode as he makes his way into his lair he has the power to decay anything he walks on.
  • Possesion: Moreover, he has the ability to possess other people, as seen in "Mortal Recoil" when he survived by possessing Princess Bubblegum.
  • Flight: He also has the ability to fly
  • Death Inducement: He can kill virtually anyone he comes into contact with. When he tried to cross Iceberg Lake, he inadvertently killed all the fish in the lake.
  • Disintegration Touch: when he fought Finn, he caught Billy's gauntlet bare handed and turned it to dust.
  • Necromancy: He is also able to implement necromancy, as seen when Finn and Jake entered The Lich's lair.
  • Pyrokinesis: While The Lich was possessing Princess Bubblegum, he shows powers of pyrokinesis, when he sets her room on fire with his mind.
  • Green Fire Generation: As mentioned above, the Lich has the ability to summon green fire from his hands.

The Lich sustains his massive strength by drinking from his Well of Power, a noxious, magic pool of glowing green liquid (which after possessing Princess Bubblegum, was substituted with a mixture of toxic chemicals such as gasoline, lighter fluid, bleach, and plutonium). THE LICH IS DANGER!!!


While his power is truly a force to be reckoned with, The Lich has a few known vulnerabilities. His main weakness is the Gauntlet of the Hero, a magical weapon that fires intense energy blasts. This weakness is now moot, as The Lich destroyed Billy's gauntlet with ease when Finn used it as stated above. Another item able to work against The Lich is the sweater Princess Bubblegum gave to Finn. Imbued with the power of "liking someone a lot," the sweater protected Finn from The Lich's flames, and was later used as a weapon. With it, Finn was able to attack The Lich and reduce his body to dust. However, the sweater doesn't seem to affect The Lich when he's possessing the monster-formed Princess Bubblegum. The Lich is also unable to control a person's mind if they are wearing a certain type of magical jewelry. While generally impervious to physical attack, traditional methods may have some limited effect on The Lich, as seen in the flashback where Billy cast him down with a kick to the face.


The Lich is driven by a rather single minded goal to destroy all life and appears to show little interest in anything that does not further his ambitions towards this dark end. He is viciously cunning, and quick to learn from his mistakes. He methodically targets those things and people who have proven a problem for him in the past by either destroying them outright such as in the case of the Gauntlet of the Hero or using them as pawns to further his own agenda in the case of Billy and Finn. As shown in "The Lich," he is highly skilled at deception, as he was able to fool Finn and Jake into helping him while disguised as Billy. At the end of the episode, he tauntingly thanks Finn for opening the portal for him. He is a quick thinker, pretending to be horrified when Finn tried to smash the Enchiridion, even though that would cause the portal to open.

The Lich is rather taciturn and speaks only in brief statements. Because he seldom speaks, his words carry great gravity. An example would be when The Lich calls Ice King "a weak fool." This could be because nearly anyone that came near him wore a protective gem in "Mortal Folly" and was weakened in "Mortal Recoil". In the episode "The Lich," he was able to talk freely with Finn and Jake. In spite of his intractability, he is visibly shocked when Finn survives his fire attack, and he laughs heartily when Finn attacks him with the sweater provided by Princess Bubblegum. He was also visibly confused when Jake altered his wish. He has only raised his voice once, when Finn asked the possessed Princess Bubblegum if everything was all right. He also has an apparent hatred for all living things, as Princess Bubblegum said that his only desire was to destroy life, and his wish to Prismo was "for the extinction of all life."

The Lich's most notable flaw is his arrogance and his driven single-minded nature. In each case his defeat has been at the hands of opponents he was derisively dismissive towards. He laughed at Finn's attempts to stop him and shrugged off the Ice King as a fool yet it was through the combined efforts of these two individuals that he was dealt a crushing defeat and forced to possess the body of a lowly snail to escape at the end of "Mortal Recoil." After regaining his strength The Lich manipulates Finn into opening a portal into the heart of the multiverse. Once again he falls prey to his arrogant and single-minded nature when he ignores Jake grabbing onto him with a dismissive grunt and continues onward towards his final goal rather than dealing with the two stow away heroes he is dragging into the portal with him. This oversight later proves to be the undoing of his masterful plan, leaving him stranded in Prismo's time room with his one wish already spent thanks to the two meddling heroes and some friendly help from Prismo.

Given that The Lich is the direct product of a mutagenic doomsday weapon unleashed during the Mushroom War it may explain why his sole purpose appears to be "the extinction of all life."

Possessed FormsEdit

Possessed Princess BubblegumEdit

When The Lich possesses Princess Bubblegum, she has pale blue/gray skin, dirty bubblegum pink hair, black eyes with green pupils and a frail voice. In "Mortal Recoil" she asks Finn to bring toxic chemicals to her (he didn't know what their purpose was), which she consumes to turn into a giant monster. Finn manages to destroy the monster with the Ice King's help, and the Candy Kingdom's doctors manage to save the uncorrupted parts of Princess Bubblegum, transforming her into her younger form.

  • One could note that the form Princess Bubblegum takes while possessed looks strikingly similar to the evil Lub Glubs of the Beautopia episode.

Possessed Waving SnailEdit

The Snail is used by The Lich in "Mortal Folly" to free himself from his amber prison. The Lich does so by taking control of the Snail's mind and making him break open the prison. After the events of "Mortal Recoil" The Lich returns to the Snail's body. During Seasons 3 and 4, the Snail continues to appear in every episode in possessed form. In "In Your Footsteps," the Bear gives the possessed Snail the Enchiridion.

Possessed BillyEdit

During the season 4 finale The Lich appeared to Finn in the guise of Billy. Using his appearance as Finn's hero, The Lich manipulated Finn and Jake into gathering the gems of power needed to activate the Enchiridion. The events surrounding how The Lich assumed Billy's identity remained ambiguous until the Season 5 season premiere where it was mentioned by Prismo that The Lich was in fact wearing Billy's dead body as a macabre disguise. Upon meeting Finn and Jake, Prismo offhandedly refers to The Lich as "a ghost wearing a dead guy" not realizing the dead guy in question was a former friend of theirs.

Possessed Farmworld JakeEdit

Shortly after coming in contact with the pool of green goo created by the Mushroom Bomb, Farmworld Jake began to mutate into a Lich/Dog hybrid.

Possesseded Ice KingEdit

Shadowgram (Possessed Leonard)Edit

After Leonard defeated Death on "Rage Quit', The Lich goes into Leonard's body, taking full control of him turning him into a shadowgram. Finn managed to defeat the Lich again and Leonard was freed from control by the Lich.


Original pitch documentEdit

He was first alluded to in the early series pitch, and was the only other character described in those documents in addition to the main six: Finn, Jake, Princess Bubblegum, Lady Rainicorn, Ice King, and Marceline. The pitch document states in all caps, "THE LICH KING IS NOT FUNNY," and states that The Lich had been imprisoned within his castle (although this was later contradicted in "Mortal Folly"). According to the pitch document, he uses a legion of undead skeletal knights to aid in his battles.


The Lich's exact origins are ambiguous. However, he seems to originate from the explosion of the Mushroom Bomb (the atomic bomb that ended the The Mushroom War and is the cause of the unnatural creatures of Ooo, such as Candy People and Sign Zombies.) When Finn wishes that the Lich never existed, he then prevented the Mushroom Bomb from ever going off, thus creating the Farmworld alternate dimension. In the Farmworld dimension, Simon Petrikov (previous form of The Ice King) prevents the Mushroom Bomb from going off, killing himself in the process and sending the world into a 400 year long Ice Age. After this Ice Age, life continued un-mutated for approximately 600 years, and characters such as Farmworld Finn were created. But, due to Prismo's statement that Lich-possessed Billy was "a ghost wearing a dead guy," coupled with the fact that Farmworld Jake was transformed into a Lich-like monster when mutated, it is possible that only The Lich's former body was created by the Mushroom War, and was possessed by The Lich, who had existed before. This is backed up by the fact that The Lich survived his destruction at the hands of Finn as a ghost (which then possessed Princess Bubblegum, the snail, and eventually Billy). From this, it can be said that his overall powers and abilities may differ based on what he uses as a host, but this remains to be clarified.

As seen in "Jake the Dog," The Lich seems to become more of a genetic mutation than a magical being. When Farmworld Marceline and Farmworld Jake fell into The Lich's well, Marceline became a skeleton and Jake transformed into a version of The Lich itself. So The Lich's body was likely created when someone or something made contact with The Lich's well, but it also means it turns the host's abilities into his own. So this is why Farmworld Jake only attacked Farmworld Finn with its bare hands, not with magic spells or anything else, with the same applying to Billy. It is unknown if the Lich's body seen in "Mortal Folly" was his original body, or one he stole.

Episode AppearancesEdit

Major RolesEdit

Minor RolesEdit

  • King Worm (In Finn's Dream)
  • The Poor Peasant (Mental Image)
  • All the Little People (Miniature Version Seen)


MK vs. ATEdit

Signature MovesEdit

  • Green Fire: Lich throws green fire from his hands.
    • Green Mass: enchanted version of Green Fire.
  • Skeleton Scratch: Lich summons a skeleton from the ground who chokes the opponent while another skeleton appears and scatches them (choking time can be extend until the opponent manages to escape)
  • Rotting Ground: Lich leaves a trail of dead behind which hurts the opponent when stepped on it.
  • Touch of Death: Lich touches the opponent causing massive damage.
  • Hothead: Lich's eyes glow, and when he reaches the opponent (who cannon be too far away) he sets their head on fire (green fire).
  • X-Ray - Disintegration: Lich sticks his hand into the opponents body he grabs the stomach which he turns to dust followed by the liver.


  • Pool of Death: Lich lets the opponent walk into a pool which shines green. The opponent's flesh then melts away in it, and their skeleton floats in it.
  • Suicide: Lich goes into the opponent grabs their own weapon and slices the throat (or choke themself when having no weapon). Lich comes out safely.

Special SkinsEdit

  • Lich King: Lich's original design.
  • King Demonicon (DLC): appearance of King Demonicon


  • The Lich is still referred to by his old name, Lich King, in various official episode summaries and clip descriptions on Cartoon Network's site, indicating that the name change may have been done very late in production.
  • The original name, Lich King, was only changed because this name already belonged to a World Of Warcraft character, and Frederator Studios was afraid that they would be sued. The design of the Lich is also very similar the design of a character in the Warcraft license, Kel'Thuzad, a human changed into a Lich.
  • In fantasy fiction, a lich is a powerful magician who has transformed himself into an undead creature to achieve immortality.
  • The Lich is the first world threat that Finn and Jake have dealt with, the second being Flame Princess and the third being Gunter.
  • The Lich was redesigned at least once; the creators felt that his original design wasn't scary enough.
    • The Lich's final design is similar to that of the Horned King from the 1985 Disney film The Black Cauldron, which is an adaptation of Lloyd Alexander's series of novels The Chronicles of Prydain.
    • On, you can set your profile picture as the original Lich.
  • Pendleton Ward originally wanted to cast Tom Waits as the Lich.[1]
  • In France/Belgium, there was a translation problem with Lich King's name. During his appearance in "His Hero," he is called "Le Roi sangsue," which translates to "Leech King."
  • In "The Lich," when Jake asked The Lich (disguised as Billy) how many gems were left, he told him without speaking. This could be because The Lich couldn't talk to Jake since he was holding the power gems.
  • Despite being undead, he can apparently eat, as seen in "The Lich" when he was disguised as Billy.
  • In all of his appearances after "King Worm" (not including the Snail) the Lich's face is noticably less detailed than it was in "Mortal Folly/Recoil"
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