The X-Men and their enemies are among Marvel's most impressive figures. When they're properly aligned and focused, the X-Men have been able to terraform entire planets or wipe out entire species. The full classification of their strongest characters has been codified in the modern Krakoa Era, giving certain mutants a formal title to reflect their true potential.
Source：https://www.cbr.com/x-men-mikhail-rasputin-omega-level-mutant-marvel/
