Fargo's Mod/Eye of Cthulhu (Eternity Mode)

Eternity Mode Eye of Cthulhu is a pre-Hardmode. It is a more powerful version of the Eye of Cthulhu with more attacks and new behavior.

Behavior
Eye of Cthulhu's main behavior focuses on dashes and spawning accelerating Moon Sickles.

Phase 1
Eye of Cthulhu tries to stay above the player while spawning fast Servants of Cthulhu. It then dashes 3 times towards the player, and repeats the cycle.

Under 65% health, Eye of Cthulhu enters phase 2, transforming into a mouth.

Phase 2
Eye of Cthulhu dashes more aggressively, but no longer spawns servants. Its chain dashes emit accelerating Moon Sickles and an eight-directional spread of sickles where it began each dash. After finishing a set of chain dashes, it teleports to the other side of the player and does another set of chain dashes, repeating the cycle.

Under 6% health, Eye of Cthulhu enters phase 3.

Phase 3
Eye of Cthulhu teleports to one of 4 corners around the player and then does an extremely fast set of zigzag Moon Sickle chain dashes. These dashes cannot be outrun and can only be dodged by predicting the safe spots between them. It repeats this pattern until dawn or it is defeated.

Tips

 * Every time it teleports, Eye of Cthulhu positions itself so that it will ram the player if they stay still. Conversely, moving slightly is enough for the player to avoid contact damage.

Trivia

 * If the Eternity Mode Recolors option is turned on in the Mod Configurations menu, it resembles a True Eye of Cthulhu.