Frozen Flame凍てついた炎

A gemstone that is shaped like crystalline fire.
In-game description

How to get Frozen Flame

Dig up the Digging Spot Desert found inside a scene (building, ruin, camp and so on) (guaranteed)Where: Frozen Flame Shrine [The Desert of Beginnings] (1 per world)

Scene containers, dungeon placements, guaranteed drops and natural spawns are based on the Obtaining data of the Core Keeper Wiki (Fandom) (CC BY-SA 3.0), because these are not in the game files this site reads. Scene names are the wiki's English names.