Sabretooth
REAL NAME: Victor Creed

When it comes to savagery, no one can match the X-Man Wolverine - no one except the mutant called Sabertooth! Like Wolverine, Sabretooth is strong, fast and agile and possesses hyperkeen senses and a fast-healing factor! Both men were involved in Canada's super-secret Weapon X project, and they once worked side-by-side as government agents! But for reasons lost among their scrambled memories, they parted ways as bitter enemies! Now, whenever this maniacal assassin-for-hire meets Wolverine, the fur is sure to fly!

In the beginning...
Sabretooth's memories were deliberately altered, causing him to believe that Wolverine is his son!