The Marvel Universe has extremely powerful mutants who are capable of incredible feats. Over the years, the X-Men's strongest mutants were categorized as "omega-level," but they weren't always officially classified. The House of X rebranding revealed an official omega-level mutants list, although there were still some debatable inclusions and absences.
Source：https://www.cbr.com/every-omega-level-mutant-ranked/
