Multiverse theory

The Multiverse Theory is a popular and commonly believed explanation for magic, created by Datuer Rin in 9892. Age has changed the theory very little. The following is an excerpt from Rin's The Mystery of Magic (9899).

''  Assuming there was a definitive start of time, there were infinite universes in an array. Something must have pushed one of them, for whatever reason, and it ended up colliding with our universe. Now, for the sake of explaining, I will refer to our universe as Datuer, and the other as the Rin universe. Presumably, Rin is full of a powerful energy - magic. Given magic's dangerous nature, I will be assuming that Rin has no life in it. Now, basically, for an unknown reason, Rin could have at some point collided with Datuer, somewhere near the northwestern side of our planet Prim. Magic can presumably be channeled from Rin to Datuer, more so at areas closer to the collision (Yliad, in this case). However, too much stress put into channeling the energy from Rin to Datuer can expand the collision spot, creating tiny but effective rips in space.