Overview
The Twins is a boss in Terraria, rendered as a composite of 2 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
Mechanical Eye at night (Hardmode).
Notable drops
- Waffle's Iron (1 in 1)
- Retinazer Trophy (1 in 10)
Fight composition
The Twins is composed of 2 pieces (Retinazer, Spazmatism). Plan your weapon choice around hitting all parts — piercing weapons or wide AoE tend to outperform single-target damage.