Neet
Once upon a time, there was a world. It was full of strange things, from giant fungus to crystal rain. It existed peacefully.
One night, a comet crashed into the planet, bringing alien organisms along with it. The invaders took over, leaving the world unstable.
The world panicked and resorted to taking beings from other universes to fix it. Among a number of other aliens, humans from Earth were taken to this world.