Multiverse

The Multiverse is the extent of known reality that can be traversed by Minifigures. It is the universe in which the known universe resides where it is accompanied by many parallel universes. The Mirror World, home of the Mythrans, does not exist within the Multiverse but outside of it as a reflection of all universes.

Notable Universes
The Following universes are listed as named by Universe One's Qmt:

Universe One: The universe where most LUCL canon stories take place, and the universe where the video game LEGO Universe takes place.

Universe Zero: A universe where the Imagination Nexus was never found, and the Nexus Force was never created.

The War of the Nexus: A universe where the Nexus Force is engaged in a civil war.

Universe X: A universe where the Chaos Force uses the power of Maelstrom to fight Imagination.