Troll Lords

Rock Trolls are a race that lived on Nornheim.

Thor: God of Thunder
The Rock Trolls are a race of creatures led by Ulik, the Unstoppable Troll. As part of his quest to make himself look like the ultimate and greatest hero of Asgard, Loki sent his adoptive brother Thor to Nornheim, where Thor battled Ulik. Contrary to his plans, Loki was forced to aid his brother in activating Frostgrinder, the Troll equivalent of the Bifrost Bridge in order to escape, realizing Mangog was too powerful of an adversary. Upon their exit, Loki destroyed Frostgrinder to prevent the Trolls from retaliating.