Hafþór Júlíus Björnsson is an Icelandic professional strongman, actor, and former professional basketball player.
He plays Ser Gregor "The Mountain" Clegane in the HBO series Game of Thrones.
Charles Xavier leads his team of mutants into battle against the Brotherhood, led by his old friend, Erik Lehnsherr who goes by the belief that 'mutants are superior over humans'.
