Terraria Mods Wiki
Treasure Bag.gif Expert Mode-Only Content: This information (or parts of it) applies only to Expert mode and Expert mode worlds.
Optical Energizer
  • Optical Energizer item sprite
Stack digit 9.pngStack digit 9.pngStack digit 9.png
TypeCrafting material
Tooltip'It feels like it's watching you'
RarityRarity level: 1

The Optical Energizer is a crafting material obtained by successfully using at least 10 Eyemalgamations at once and defeating the subsequent Eye of Cthulhu swarm. It is solely used to craft the Mechanical Leash of Cthulhu.


Used in[]

ResultIngredientsCrafting station
Mechanical Leash of CthulhuMechanical Leash of Cthulhu
Fargo's Mod/Crucible of the CosmosCrucible of the Cosmos
Fargo's Mutant Mod:
Boom Shuriken (Fargo's Mod).png Weapons • Mechanical Amalgam (Fargo's Mod).png Consumables • Slimy Energizer (Fargo's Mod).png Materials • Mutant (Fargo's Mod).png NPCs • Regal Statue (Fargo's Mod).png Furniture • LumberJack Hat (Fargo's Mod).png Vanity • Portable Sundial (Fargo's Mod).png Tools • Autohammer.png Added Recipes