A liverse is a universe with bubble spheres that contain air and other things needed for life to develop, some have underwater plants and sponges and worms, while others only have algae and fish, when the bubble spheres collide, they move into each other, during that time, they collide like universes would, and they keep moving until they turn into one, when they turn into one, they release a giant ammount of energy.
An Outverse is a multiverse that contains multiple liverses. The void between 2 liverses looks like green. There is also a green wall around the Outverse.
It's size can be up to light-years, despite that it's a type of multiverse.