The Immortal Fireflower.
It was mythically believed to be immortal hence the name. In the four corners of Fjormir's Realm, the Immortal Fireflower is one of the handful of mysteries that existed within.
A flower that blooms on a double full moon, emitting a heat that could melt even the strongest of metals. It is said to have a life of its own, transforming into a six-winged faery with four slits as scarlet eyes. In Fjormir's Realm, seeing one is considered a stroke of good luck, since no one had seen it and come out of it alive.
Even the Fjormir, the Overseer of Fire, greatly respected the Immortal Fireflower since it could rival the amount of heat she could withstand. In terms of heat immunity, the Immortal Fireflower is on par with Fjormir, but in no way could they measure up to Fjormir's sheer excellence and power.
Albrecht jumping in---
The Immortal Fireflower: shocked pikachu face