Cthulhu

was originally devised by author, as an evil god from beyond the human universe. The creature is a popular element of today. In Terraria, a number of enemies and items include references to Cthulhu:

Bosses

 * - represents Cthulhu's brother according to Cenx.
 * - represents Cthulhu's brother according to Cenx.
 * - represents Cthulhu's brother according to Cenx.

Enemies

 * - looks like Cthulhu's head.
 * - looks like Cthulhu's head.
 * - looks like Cthulhu's head.

Miscellaneous

 * [[File:Cthulunado.gif]] Cthulhunado

Trivia

 * 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 Cthulhu: "Cthulhu is mad...and is peeing out an eye!"