Eye of Cthulhu 

The Eye of Cthulhu (EoC) is typically the first boss terraria players fight, it appears as a giant floating eye ball in it's first stage but in it's second stage the iris is replaced with a mouth and has a rapid charge attack in expert mode

Melee: you guys ready for the eye of Cthulhu?
Ranger: yep just made a new bow

Eye of Cthulhu by TerrarianAthena December 7, 2021

Eye of Cthulu 

Eye of cthulu is something commonly known by Terraria players. Eye of Cthulu, commonly Abreviated to EoC.

I just beat the Eye of Cthulu today.

Eye of Cthulu by TheIronBigMan March 1, 2021