Corruptor

The Corruptor is an enemy that was introduced in the 1.1 patch. They spawn after the defeat of Wall of Flesh and are similar to the Eater of Souls, but are much stronger, having 230 health each.

Their projectile attack will corrupt the ground it touches, so its advisable to slay any chasing you out of the corruption to avoid losing any Hallow you have in place to contain the corruption. Their Vile Spit can also inflict the Weak debuff for a very long duration. As with Fire Imps and Dark Caster, the Vile Spit projectile they fire is an enemy with one health, meaning you can destroy it with any kind of weapon. This also means that by effect it will sometimes block shots from non-piercing projectile weapons.