Troll

Trolls are monsters in Norse Folklore.

History
In Norse Folklore, trolls dwell in isolated rocks, mountains, or caves, live together in small family units, and are rarely helpful to human beings. Similar to the Dwarf, trolls also turned to stone if exposed to sunlight.

The Sword of Summer
A half-troll named X was said to have died trying to stop a dog fighting ring and ended up on the nineteenth floor of Hotel Valhalla. But it turned out he was actually Odin in disguise.

Junior also built a reusable self-guiding troll-seeking missile, that could destroy any troll at a distance of half a mile. But thanks to Samirah al-Abbas attacking him as a horsefly, it was nothing but a useless metal cylinder.

9 from the Nine Worlds
A troll was summoned by Wildflower and Sunspot when Hearthstone broke through the gate of the mansion they were guarding.