Genesis

When planet Earth and its inhabitants are threatened with extinction by unforeseen forces, humanity tries hard to preserve their homes, but they are not strong enough. There is one human, however, that is strong enough to save humanity, but they'd never be able to do it on their own and survive. This affects everything; if the Earth is taken over, it will die before its lifespan, concerning the Universe. That is why the Universe has tasked its messenger, its most trusted and powerful force, the Phoenix, with perishing itself with its flames to create a being in the form of a human. After doing this, the Phoenix's "human" will be taken to Earth, which will accompany the most vital human, to protect them and the planet. However, if humans fail to save themselves and their planet, the Phoenix (specifically its creation) will obliterate everything, including humans, by engulfing the world in flames.