Scientific name -- Atlas rimethurse
Size -- 15' tall
Diet -- frozen water (or more on wedding feasts. See below.)

The thurses, also called frost or rime giants, were among the first of the giants created when the world began. As opposed to the brutish Jotun, or mountain giants, the frost giants were ancient beings, symbolizing the time before the gods existed. They lived in the realm of Jotunheim, one of the Nine Worlds of Norse mythology, along with Muspellheim and Midgard. Jotunheim was the land of giants, and their leader was the frost giant jarl, Thrym ("uproar"). He was an archenemy of Thor, and once stole his hammer, Mjolnir, and also demanded Freyja for a wife.

As the tale goes, Thor dressed up as Freyja and went to retrieve his hammer. During the feast, the giants were amazed that "Freyja" ate an ox, several salmon, and large tankards of mead. Loki made the excuse that "Freyja" had not eaten in days because she was so excited to be married to the king of the giants. When Thrym peeped under "Freyja's" veil and saw Thor's beard, Thor threw off his disguise.

"Thor's heart laughed within him when he saw his hammer. First he struck down Thrym, the King of the Thurse, and then he slew all the giant's kin. He also killed the giant's poor sister who had begged for a bridal gift. Instead of shillings she received blows and instead of rings, a hammer hit. And thus Odin's son retrieved his hammer." -- Thrym's Lay from the Poetic Edda