What restrictions are there on the Eater of Worlds?
The Eater of Worlds can ONLY be summoned on Corrupted areas. Summoning the Eater of Worlds when not directly inside Corrupted areas WILL result in INSTANT DEATH. Once summoned, however, you can lure him anywhere and battle him outside of the Corruption. The Eater of Worlds can be summoned an infinite amount of times, assuming you have Worm Bait. Unlike the Eye of Cthulu, the Eater of Worlds can be summoned at any time during the day. The battle will the Eater of Worlds will continue until he’s dead, and he’ll track you down at your spawn point, so be ready to fight to the death.