Calamity Eye

Calamity Eyes are a Pre-Hardmode enemies that spawn in the Brimstone Crag. They act like Demon Eyes, but will inflict the Brimstone Flames and Weak debuffs on contact. When below half health, their speed and maneuverability increase.

In Death Mode, Calamity Eyes are capable of becoming intangible and passing through blocks for a brief period of time, in order to reach the player.

After Providence, the Profaned Goddess is defeated, their stats receive a significant boost and they begin dropping Bloodstone.

Trivia

 * In previous versions, Calamity Eyes would spawn on the Surface after Plantera had been defeated.