The Eye of Cthulhu is a boss from Terraria. It has two forms. Its first form is just a giant eyeball. Its first form has the ability to: Fly, Phase through walls, Spawn mini weaker versions of itself, and ram into you. In its second stage its pupil turns into a mouth with giant teeth. It can still fly and go through walls however it no longer spawns minions in its second form, instead choosing to try to eat you.  Unlike in the game this version seems to be able to speak.