The Slime Crown is used to summon King Slime, a Boss-type enemy. While King Slime can spawn randomly at any time without the use of a summoning item (though only in the outer two-thirds of the map, laterally), the Slime Crown summons King Slime instantly, in any location. The Slime Crown can be crafted at a Crimson Altar or Demon Altar.
- Because the Slime Crown can be crafted with either a gold or platinum crown, the sprite uses colors from both crowns to create the illusion that the crown the player used is being shown.
- 220.127.116.11: Now only requires 20 Gel to craft instead of 99.