The Universe Swarm

The Universe Swarm is an infinite collection of universes and sometimes multiverses that were originally contained by the Primordialverse, but became too erratic and split off.

These clumps of universes eventually covered the entire Primordialverse and some even merged due to their close proximity, some merged so much that they became classified as multiverses.

Even if it weren't for the barrier across the Primordialverse making it very difficult to traverse in and out through, the huge amount of clustered universes block almost all entrances.