Crimera

The Crimera is technically the Crimson variant of the Eater of Souls and as such, behaves in the same manner. It will fly toward the player, sometimes circling it at a set distance before rushing toward it.

Spawning
It spawns only in the Crimson biome and in several varieties with different sizes that has different amounts of health, strength and defense.

Trivia
The Crimera's name is a portmanteau of crimson and chimera, a mythical beast made of parts from different animals.

The Crimera is most likely made of a silverfish (body), leech (mouth), and a bull (horns).

The Crimera may also be a reference to the sci-fi third person shooter trilogy "Mass Effect" where there are massive sentient robots called "Reapers"