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 series of disappearances and supposed sightings of "ghosts" have been happening around Valentin's Circus Of Strange. Nightwing and the rest of the Batfamily take it upon themselves to investigate.
