In the beginning of Prismatica, there were only the tree and the phoenix. As the phoenix fed on the leaves of the tree, the tree collected the bird's feathers.
In time, the tree bore fruit, which became the multiverse of the Prismatica. While many worlds come into life only to die, five of the realms have come to house the five factions of the Prismatica multiverse.
On the clearest of days, people living on the various worlds can catch glimpses of the twinkling iridescent feather leaves of the world tree in the night sky, much like seeing the Milky Way or Aurora Borealis in our own night skies.
It is the Phoenix energy that breathes life into the realms of the five factions, granting prosperity, but also the potential for war, conquest, and the power to sever space time to invade other worlds. This is multiverse of Prismatica.