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.
A deranged scientist who performs twisted surgeries on his victims to make them into Dollotrons, his idea of perfection. Professor Pyg often comes into conflict with Batman and was formerly an agent of Spyral.
