Mutant Classification

There are several known conventions for the classification of mutants and the relative strength of their powers. The most prominent of these is the Alphabetic Scale, which was used by the X-Men themselves. It is based on data drawn from Cerebra, a device capable of detecting mutant x-gene engrams in a person's DNA. Using a complex series of precise readings and calculations, Cerebra was able to measure the relative potential of a given mutation and classify it according to the following scale:

The Alphabetic Scale
Ω - Omega
 * qualification: incalculable potential, extreme energy/matter manipulation, or psionic ability, immortality, exist outside the boundaries of the physical universe
 * power examples: immortality, various permanent actions, significant telepathy, powerful masteries
 * character examples: Bobby Drake (Iceman), Josh Foley (Elixir), Jean Grey, Andrea Richmond (Figment)

Α - Alpha
 * qualification: extreme energy projection, strong energy/matter manipulation or psionic ability, extreme physical potential:
 * power examples: energy attacks or physical stats AN9+, enhanced healing factors, reconstitute self, most masteries
 * character examples: Scott Summers (Cyclops), Emma Frost, Alexander Derasmo (Wind-Up), Kelly Marshall (Wind Dancer), Sveta Kitarov (Naiad), Parker Fry (Cirrus), Julian Keller (Hellion)

Β - Beta
 * qualification: strong energy projection, limited energy/matter manipulation or psionic ability, considerable physical potential
 * power examples: energy attacks or physical stats AN 6+, accelerated healing factors, limited/specific masteries
 * character examples: Logan (Wolverine), Nathan Jacobe (Test), Ashida Noriko (Surge), Victor Borkowski (Anole), Henry McCoy (Beast)

Γ - Gamma
 * qualification: limited energy projection, enhanced physical or mental potential
 * power examples: energy attacks or physical stats AN 4+, minor modifiers, subsonic flight
 * character examples: David Alleyne (Prodigy, formerly), Thomas Reese (Badger), June Kent (Junebug), Monet Chiu (Chatterbox)

Δ - Delta
 * qualification: physical and mental potential within natural boundaries (but potentially unnatural for a human)
 * power examples: ANs mostly 3 or under, natural flight, enhanced senses, minor modifiers
 * character examples: Flavio Braca (Ocelot)

Ε - Epsilon
 * qualification: obvious physical or mental mutation with no net benefit; mutation may even be a hindrance
 * power examples: none
 * character examples: Ahn Myung Sun (Glimmer, formerly)

Depowering and "Rems"
Some factors can permanently remove a mutant's X-gene and any and all associated mutant powers. Notably the Hope serum was designed to do precisely this, and has been used on mutants around the world since it became widely available following the Last Stand and the subsequent bolstering of the Superhuman Registration Act. Prior to that, M-Day famously depowered over 98% of the world's mutants, and caused a two-year global drout in the appearance of new mutations.

In most cases, depowering removes all traces of mutation from a subject; however, in some rare cases, some minor signs of their former mutation remain indefinitely. This is most evident in mutants who retain unsusual physical features after being depowered. These individuals are colloquially known as "Rems", short for "remnants", and are likely to face the stigma associated with being a mutant for the rest of their lives.