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Bone Key
  • Bone Key item spriteold Bone Key item sprite
Stack digit 1
Use time20 (Very fast)
TooltipSummons a Baby Skeletron Head
RarityRarity level: 3
Research1 required
Grants Buff
BuffBaby Skeletron HeadBaby Skeletron Head
Buff tooltipDon't even ask...
Summons Pet
  • Baby Skeletron Head
    Baby Skeletron Head
Obtained from Obtained from
Classic mode icon Classic
Expert mode icon Expert
Master mode icon Master
Dungeon GuardianDungeon GuardianDungeon Guardian1100%

The Bone Key is a pet-summoning item that is always dropped from the Dungeon Guardian. Upon use, it summons a Baby Skeletron Head pet which follows the player around infinitely. The Baby Skeletron Head floats around the player and sometimes spins its head, similarly to Skeletron's spinning head attack or the Dungeon Guardians in general. This action may also occur if the player is a bit further away from the Skeletron Head. Because Dungeon Guardians have extremely high stats intended to instantly kill all players, this can be a difficult item to acquire.


  • This item cannot be obtained in a world where Skeletron has already been defeated, as Dungeon Guardians will no longer spawn.
  • Similar to the Zephyr Fish, the head that follows the player will not teleport to them when they end up a long distance away from it, but rather will just keep moving towards the player. One can instantly teleport it back to themselves by toggling the visibility of it off, then back on again in their pet slot.
    • Alternatively, if being used as a summon from the players inventory, they can simply re-summon it.


For more elaborate strategies on defeating Dungeon Guardian, including weapon and arena recommendations, see Guide:Dungeon Guardian strategies.


  • It is most likely designed and named after a 19th century Bit key, known erroneously and commonly as a skeleton key.
  • Despite being extremely difficult to acquire, it only sells for 5.

See also[]