Gods

Powerful beings from other star systems or worlds, and from other planes; demihumans or humans with superpowers, or celestial beings regarded or termed as gods. 
Various peoples have come into contact with these powerful beings and have either worshiped them or are empowered by them. 
The powers, abilities, and realms of the gods are often exaggerated by some of their worshipers. In the land of Astra and in the cosmos, there are no gods, omnipotent or creating of the universe and its forces, nor do the gods of classical mythology brought over by the humans of Earth even exist. The universe, as it is understood by the highest sages and philosophers, is thought to be made of a clockwork structure of matter, the energy of which can neither be created nor destroyed. The universe is thought to be the result of an explosion of highly energetic astral aether, that even today is continually expanding, pushing its own confines, producing and suffusing new matter.
Universes cannot be created. As part of a multiverse, only extra dimensions of the same universe can come into existence, and not through physical power of any being.