Eye of Cthulhu
From Dungeon Defenders 2 Wiki
Eye Of Cthulhu is a boss from Terraria, due to the crossover, this was added. The Eye of Cthulhu is a flying enemy and has 2 stages - a starting form of an eye, alternating between staying above a character and spawning Servants of Cthulhu (miniature versions of itself) that swarm the player but have little health and deal Physical Damage, and ramming the player, dealing high amounts of Physical Damage, then it transforms after losing about 3/5 health into a similar form with a fanged mouth instead of an eye, and alternates between staying near the player and ramming, dealing elevated amounts of physical damage. The Eye Of Cthulhu does not spawn Servants of Cthulhu in its second stage.