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Expert mode icon.png
Expert Mode-Only Content: This information applies only to Expert Mode and Expert Mode worlds.
Royal Gel
  • Royal Gel item sprite
Stack digit 1.png
TooltipSlimes become friendly
RarityRarity level: Rainbow
Research1 required
Dropped by Dropped by
Expert mode icon.png Expert
Master mode icon.png Master
Treasure BagDesktop, Console, and Mobile versions
(King Slime)
Treasure Bag (King Slime)Treasure Bag
(King Slime)
Desktop, Console, and Mobile versions

Royal Gel is an accessory obtained from the Treasure Bag dropped by King Slime in Expert Mode. While equipped, most slimes will become friendly, no longer pursuing the player, and will deal no contact damage or fire projectiles, even if the player deals damage to them.

This does not apply to the following slimes:


  • Minions and NPCs will continue to attack all nearby slimes.
  • Gastropods are considered slimes by the Royal Gel's effect.


  • This accessory is particularly valuable during Slime Rain, as it allows the player to kill almost all enemies without worrying about taking damage.


  • Royal Gel's name may be inspired by "Royal Jelly", a food substance that bee workers feed to bee larvae to change how they grow, specifically so the larvae can become a queen bee.