Smooth Stone

Synthesis > Smooth Stone

A mineral required for the refining of essential components in certain materials.

Description
A mineral that looks just like a regular pebble, but according to the Summoners' Hall, it has a distinctive feature. However, the method of distinguishing it from normal rocks is only disclosed to the Summoners in the Demon Slayer squad. This mineral can be used to extract the essence of certain materials and stabilize their effects, thus making it an essential material for crafting tools to battle demons.