Corruption

There are usually 1-3 corruptions per map that usually spawn on both sides of the map. Corruptions contain monsters such as Eater of Soul and the boss of the corruption is Eater of Worlds. The corruption contains chasms which usually have shadow orbs in. Breaking a shadow orb will result in a weapon being dropped and a 1 in 3 chance(33.33%) of the eater of worlds spawning. On every 3rd shadow orb broken the Eater of Worlds will spawn.