Eidolon - bongbongsaysbong/Nevermore GitHub Wiki
Behaviour
Eidolons hunt players in groups. They do not attack the player directly, but attempt to stand at a distance and fire waves of three homing sanity rays at a time. Like endermen, eidolons attempt to teleport when shot at, though they are not damaged by water.
Spawning
Eidolons spawn around players who are insane. They spawn in packs in the end.