Frigid fossil is stackable currency used to add more cold mods to items being inserted into a resonator. However, it does not attach any fire modifiers. Applying this one of fossils increases the spawn weight of all modifiers with cold tag by 10 and hot tag by 0. In the Path of Exile game the currency can be exchanged for a Chromatic Orb. Gamers can also buy a POE Frigid fossil from Niko the Mad for 1,000 azurites or obtain them in the Frozen Hollow biome of Azurite Mine.