Ragnarok

The tiny Nirvana Universe was no longer sufficient to serve as a battlefield. Its sturdy cosmic barrier had long since become riddled with holes. Countless bolts of shrieking lightning shattered the barrier, completely exposing the Nirvana Universe to the boundless blood domain. Tens of thousands of nearby universes also began to suffer violent upheavals. The final wails of fallen gods spread outward, triggering tremors throughout the Multiverse.