According to the X-Men wikia, there are six classifications for mutants: Omega, Alpha, Beta, Gamma, Delta, and Epsilon. What follows is a little guide to classifying a mutantâs level according to Marvel canon.Â
OMEGA: The most powerful mutants in existence. They have powers that have a massive, universal impact such as affecting timelines and entire galaxies. Also, they have vast control over matter and energy, giving them godlike powers. They also tend to have some sort of immortality component to them, but such is not always the rule.
Ex. | Iceman (Bobby Drake), Phoenix (Jean Grey), Scarlet Witch (Wanda Maximoff), Legion (David Haller), Magento (Erik Lehnsherr)
ALPHA: Second only to Omega Levels in terms of power, Alpha Level mutants comprise about 10% of the mutant population. They are mutants with incredibly powerful abilities that have few, if any, fatal flaws. The rule of thumb for classifying an Alpha Level is: if they have a normal human appearence and their mutation is both powerful, useful, and controllable.
Ex. | Emma Frost, Storm (Ororo Munroe), Shadowcat (Kitty Pryde), Gambit (Remy LeBeau), Professor X (Charles Xavier)
BETA: Power-wise, Beta Levels are about the same as Alpha Levels. The only difference is that Beta Levels have (little) flaws in their powers. They also comprise about 10% of the mutant population. The rule of thumb for classifying Beta Level mutants is that they have an overall normal human appearance BUT their mutation, while both useful and powerful, is difficult to control.
Ex. | Havok (Alex Summers), Wolverine (Logan/James Howlett), Rogue (Anna-Marie D'Ancanto), Mystique (Raven Darkholme), Toad (Mortimer Toynbee)
GAMMA: Gamma Level mutants are also incredibly powerful, ranking up with Alpha Levels and Beta Levels. However, they have major flaws in their powers that can make their lives incredibly difficult. Most typically, this occurs as a physical mutation that cannot be altered or changed as part of the mutantâs abilities. Rule of thumb for classifying Gamma Levels: If their mutation is powerful, uncontrollable, sometimes useful but most typically detrimental to living a normal life, then they are a Gamma Level.
Ex. | Beast (Hank McCoy), Nightcrawler (Kurt Wagner), Blink (Clarice Ferguson), Angel (Warren Worthington III), Azazel
DELTA: Like Alpha Levels in the respect that their powers contain hardly any flaws, Delta Levels are nowhere near the power levels of Alpha, Beta, and Gamma. Comprising about 50% of the mutant population, Delta Level mutants are the most common level. The rule of thumb in classifying Delta Levels is that they have an overall human appearance but their powers, while essentially controllable, are weak or only have narrow applications. Â
Ex. | Angel Salvadore, Cypher (Alisa Tager), Domino
EPSILON: Epsilon Level mutants are generally referred to as âunfortunate mutants.â Their abilities have major flaws that make existing within society pretty much impossible and they donât even get the benefit of a strong or particularly useful power. They comprise about 20% of the mutant population. Rule of thumb for classification: if they have an inhuman appearance and/or no power to compensate.Â