Flame-Warped Curio is a new omnitoken dropping from Fyrakk in Patch 10.2. The item can be turned in for any Tier Set piece at a vendor.
Patch 10.2 brings back the Tier Set omnitoken that we’ve seen during the previous tier. It will drop from the final boss of Amirdrassil with everyone in the raid having an equal chance to loot it. There are multiple curios based on raid difficulty and you will exchange it for a set piece of your choice at a vendor named Kirasztia.