Mountain troll

The Mountain Troll is a breed of Troll. They are the largest and most vicious of the Troll species, and are bald and pale-grey. They sometimes use Graphorns as mounts.

The Troll that Professor Quirrell let into Hogwarts School of Witchcraft and Wizardry during Halloween in 1991 was a Mountain Troll. It was defeated in the girl's bathroom by Harry Potter and Ron Weasley.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)
 * Harry Potter and the Philosopher's Stone (video game)
 * [[Fantastic Beasts and Where to Find Them (real)|Fantastic Beasts and Where to Find Them]