Frozen Crystal Ore

Description
Frozen Crystal cores are used to craft a new tier of frozen weapons. By consuming them, you will begin to learn how to craft a new tier of items called Forging.

Quote
"A rare ore found only in the mountains that contains the essence of ice."

- In-game description

Nodes
Frozen Crystal nodes can be located in the ice cave. Also dropped by ice imp (snowmen summoned by krampus)