Peter Rasputin is perennially underused in the X-Men universe, and unfortunately he's underrepresented in cosplay too. The following two photographs should illustrate why this is. Colossus is a mutant with the power to transform his body into an organic steel, making him almost indestructible and incredibly strong. Now, since not everyone is built like a sexy skyscraper, this is how Colossus is usually cosplayed.