The Eater of Worlds is a boss from the Terraria Ideas Pack. It can be summoned by an Eater of Worlds Summoner or with a 1/20 chance at night when the player has obtained at least one Diamond.


In its first stage, the EoW (as it is often called) will dig through the ground, breaking blocks. Only its head is vulnerable. As it takes damage, its segments fly off, one by one. Note that the EoW can tunnel through the ground and jump up behind you, leading to a nasty surprise. In its second stage, nothing will change except it gets much faster.
Npc 13

The Eater of Worlds in Terraria. Note: Not full size