Marvel Comics kicked off a new era of the X-Men with the release of House of X #1 by writer Jonathan Hickman and artist R.B. Silva, and it’s clear that this issue was all about setting the table for what’s to come. One way the comic establishes this new landscape for mutantkind is a series of informational pages, and while that may sound dry, they’re actually packed with noteworthy details. One page in particular from Xavier’s files is all about Omega level mutants, listing all known mutants of that esteemed power level, the nature of their abilities, and where their loyalties lie.
First, the page starts with the definition of an Omega level mutant: “A mutant whose dominant power is deemed to register — or reach — an undefinable upper limit of that power’s specific classification.”
Source: IGN.com Marvel’s X-Men Relaunch Lists All Omega Level Mutants