Flameborn 
Underwater Mud
Other Common Raw material
Soft, water-soaked mud, hauled up from the bottom of a lake or silent stream.
Crafting
Material harvested or found in the world — no crafting recipe.
Used in
(1)
Source: see “Underwater Mud” on the Enshrouded Wiki (enshrouded.wiki.gg, CC BY-SA 4.0)