Cthulhu

Cthulhu is a fictional cosmic entity originally devised by author H. P. Lovecraft, as an evil god from beyond the human universe. The creature remains a popular element of Lovecraftian horror today.

Cthulhu was a possible boss. Re-Logic was considering its addition at one point, but he was replaced by Moon Lord. While Cthulhu itself never made an appearance in Terraria, a number of enemies and items include direct and indirect references to Cthulhu.

Trivia
Lore-it is heavily implied (and joked by staff) that Moon Lord is Cthulhu's Brother or a weaker form of the original Cthulhu
 * In the concept art, he is missing one of his eyes, presumably because the missing eye became the Eye of Cthulhu boss.
 * One of the title messages on the refers to this: ""

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