Delve/Eye of Carnage

The Eye of Carnage is a pre-Hardmode that spawns in place of the Eye of Cthulhu in crimson worlds.

Spawn
The Eye of Carnage can be summoned manually using a Bleeding Eye at night. It also has a 1/3 chance of spawning automatically each night, following the same prerequisites as the Eye of Cthulhu.

Behavior
The Eye of Carnage has two phases. In its first phase, it acts identically to the Eye of Cthulhu, except that it spawns three Capillary instead of a Servant of Cthulhu.

When it falls below 50% health, or 65% health in Expert mode, it transforms into its second form, creating a Fleshy Maw. Both the second form and the Fleshy Maw behave similarly to the Eye of Cthulhu's second form.