This creature absorbes thermal energy and can set it free again at any given time in the form of flames. This way it can also "eat" by incinerating nearby structures or bodies.
When it runs out of energy it changes its shape to a thick dark metallic ball, in this shape it can survive thousands of years until the sphere reaches a certain temperature again in which it regains its conciousness and its power.
For the weekly challenge.
Edit 12.7: Fixed a lot clusters.