• The Lich is still referred to by his old name, Lich King, in various official episode summaries and clip
    310px-Tumblr m93uzqhXQL1qgsrr1o1 500
    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.
  • 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 character Finn and Jake have faced that has endangered the fate of the world.
  • 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 Disney film The Black Cauldron, which is an adaptation of the novel The Book of Three.
    • On, you can set your profile picture as the original Lich.
  • Pendleton Ward originally wanted to cast Tom Waits as the Lich.
  • In "King Worm," he makes his second normal body. He is also seen, as the snail, at the end of the episode behind Finn after defeating King Worm.
  • 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."