After planet was reformed It was like a black hole suck up everything in the universe, like a black hole. After all the asteroids and stars near the planet were sucked up the planet was moved to the outer far reaches of the Milky Way with a formation. After 25 million years the planet started to bring life back to its blue planet but in turn the some of the beasts were released.
Some beasts can like in polluted, acid, toxic don't breath oxygen. The beats have mutated. Some beast can cultivate ie call them demons all beasts can but theses ones mutated and are extremely dangerous. A immortal or god will die because the have such toxic energry where the the zerg race and the sky beast use spiritual engery or mind energry.
The immortals left the earth planted beasts and moved the planet but forgot. To make sure the energry was not corrupted now all the hard work is being erased or not suitable for human life. After another 40 million years the earth bad energry still there but life is there got creatures called Dinosaur.
The planet is full of them but not all the beasts were released, in hidden spaces all over the world is pocket spaces(duegons) full of beasts not released.
There is a ship like object orbiting the planet scanning for human life, but there is none no human activity. So scan the center of the planet the genese of humans where not released why cause the beast git by a flaw. So know some has to come and fix the planet.
The object sends a signal to deep space. The immortals send a ship know as the cosmic moon aka the moon and yes this earth timeline has no moon. They also send a 5 meter wide asteroids to hit the planet to kill everything.
The moon a structure like and othe it has level 8 technology spaceships ai. But in order to access it the humans need to be able to fly out from the planet and access the inside of the moon. The moon has a white drawf(star core) as its engrry source so it will run for a really long time.