X-Men Origins: Sabretooth #1 (X-Men Origins (2008-2010))

Every year, he beats Wolverine to an inch of his life. You won't find a sicker, more dangerous person in the Marvel Universe. But why? Why is he so vicious? Why is he so brutal? Why does he leave a wake of violence and death everywhere he goes? Look into Sabretooth's eyes and tremble at the truth.