Spectre

Spectres are flying undead creatures that spawn in the End, particularly small End islands. They are a cousin of the Phantom, and phase through blocks. Spectres cannot be damaged, except through magic damage. They are peaceful.

Player Use
While Spectres normally do not care about worldly matters, they do have an interest for Soul Hearts. If a player holds a Soul Heart within a Spectre's vicinity, it will begin to follow the player. The player can then attach a lead to the Spectre, and the Spectre will take the player flying around the End. This can be used as a form of transportation, but the cache is that the player has no control over where the Spectre goes.