The Genocide of the Multiverse

"The Genocide of the Multiverse is a major and catastrophic event in the history of the Multiverse in which a single being was able to exterminate every living thing, every Timeline, every Universe, and every Omniverse that resides within the Multiverse, and even went as far as destroying whatever existed beyond the Multiverse, amassing a power truly like no other. The being in question is suspected to be Ozzy, a recently discovered Monster from a nonexistent Timeline. It is still unclear how he managed to succeed, but all that is known is that he was not working alone, though the second suspect is yet to be identified. No one in the entire Multiverse is aware of this event, due to the assumption that Ozzy and his 'partner' RESET everything after they succeeded, therefore erasing all the memories of what happened, and afterwards returned to their Timelines."