Colossus is a mutant because he possesses the unique, innate superhuman ability to transform his entire body into a highly resilient form of organic steel. This extraordinary power is a genetic manifestation, making him a member of Homo superior.
The Nature of His Transformation
Colossus's mutant power enables him to undergo a complete bodily metamorphosis. When he activates his ability, his flesh, bone, and organs rapidly convert into a dense, metallic substance. This "organic steel" grants him immense durability and strength, far surpassing typical human capabilities.
Key Aspects of Colossus's Mutant Ability:
- Full Body Transformation: A defining characteristic of Colossus's power is that he must transform his entire body into its armored state. He cannot selectively transform only a portion of his body; he is either entirely in his human form or entirely in his metallic form.
- "Organic Steel" Composition: The substance he transforms into is described as a unique form of "organic steel." While its properties are noted to be similar to the incredibly dense and corrosion-resistant metal osmium, the specific chemical composition of this organic material is still unknown.
- Enhanced Physical Attributes: In his metallic form, Colossus gains superhuman strength, greatly increased stamina, and an extraordinary resistance to injury. This includes protection against most conventional projectiles, extreme temperatures, and powerful blunt force impacts.
This inherent genetic capability to transmute his biological structure into organic steel is the fundamental reason why Colossus is identified as a mutant.
