Overview
Eye of Cthulhu is a boss in Terraria, rendered as a composite of 3 NPC segments. This guide pulls together the official spawn rules, drop table, and progression context so you can decide when to attempt the fight and what to bring.
How to summon
Suspicious Looking Eye at night, or rare auto-spawn at night after 200 HP & 3+ NPCs.
Notable drops
- Eye of Cthulhu Trophy (1 in 10)
Fight composition
Eye of Cthulhu is composed of 3 pieces (Eye of Cthulhu, Servant of Cthulhu, Servant of Cthulhu). Plan your weapon choice around hitting all parts — piercing weapons or wide AoE tend to outperform single-target damage.