This is a little piece of info you'll need for my other book (Two Sides of a Coin) and all other crossover book I will make in the future. (This is just an excuse to allow me to make characters from different object shows related)
Rifts are basically random portals that can take an object to anywhere in the osc (more common to happen between two "neighboring" universes). They appear in clusters at random. There is currently no way to make artificial rifts... or is there?