Sabretooth[a] is a character appearing in American comic books published by Marvel Comics. Created by Chris Claremont and John Byrne, he first appeared in Iron Fist #14 (August 1977) and was initially depicted as a serial killer known as "the Slasher", before being developed into a supervillain associated with the X-Men during the "Mutant Massacre" crossover in 1986. This portrayal of Sabretooth has endured as the archenemy of the superhero Wolverine.