Corruptor

The Corruptor is a Hardmode enemy, a greater version of the Eater of Souls with 230 health.

Their projectile attack may 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 weapon. This also means that it will sometimes block shots from non-piercing projectile weapons.

Behavior
Corruptors will behave similarly to the Eater of Souls, although they (usually) do not attack in swarms. They will use a ranged attack only if the player is not attacking from close range. The Corruptor is immune to the Confused debuff, so it will not flee when hit by the Dao of Pow or Bee Keeper.

Trivia

 * Corruptors are probably named such because of their native biome and old ability to corrupt blocks.