The Brain of Thought is a craftable Hat Item from the Shipwrecked DLC. It requires an Alchemy Engine or Sea Lab to prototype, and 1 Brainy Matter, 1 Jellyfish, and 2 Ropes to craft. It is used to access hidden crafting recipes that have not been prototyped, including Volcanic Tab items, which cannot be prototyped and require being near an Obsidian Workbench to craft. A Brain of Thought can be used to craft 4 items and /or Structures, after which it will disappear. Crafting a recipe with a Brain of Thought will not count as prototyping.
- Caution is advised, as the Brain of Thought will lose one use upon crafting any recipe while it is equipped, even if the recipe was previously prototyped.
- It can be helpful as a replacement for science or magic stations during Monsoon Season if they become flooded and non-functional.
- A Brain of Thought currently only allows access to Ancient Tab recipes when brought into the base game or a Reign of Giants world using the Seaworthy.
- The name may be a pun on the common saying, "I lost my train of thought."