User blog comment:SayuriDarling/Magnus Chase and the Gods of Asgard Official Discussion/@comment-25044056-20150628174925

I've made a list of giants from Norse mythology that could serve as antagonists in this series. I've excluded from this list any giants I specifically know were killed.

Sutur' and 'Simnora Surtur is the lord of Musphelheim and leader of the Fire Giants whose sword will destroy the world at Ragnarok. Simnora is Surtur's wife and the keeper of the sword Laevateinn.

UtgardaLoki and Skymir: UtgardaLoki is the lord of Utgard and master of illusions, he managed to humiliate both Thor and Loki and escape without any consequences. Skymir is the biggest giant in all of Joutunheim; the only giant Thor is afraid of and the only giant that Mjolnir has no effect on whatsoever. Some people interpret the stories to mean that Skymir is actually another one of UtgardaLoki's illusions but this is never specifically stated.

Hraesvelgr a giant lived in the northenmost end of heaven, takes the form of an eagle and his beating wings are the source of all the winds in the world.

Vafthrudnir the wisest of all giants who once was challenged by Odin in a contest of wisedom. Vafthrudnir apparently knows the future and a lot about Ragnarok. The one question he couldn't answer was "what did Odin whisper into Baldur's ear as he mounted the pyre?"

Angerboda the love of Loki and mother of Hel, Fenrir the wolf, and the Midgard serpent.

Aegir and Ran: Aegir and his wife Ran are giants who personify the wild nature of the sea, they cause death and disaisters. They have nine daughters who personify the waves. Unlike the other giants on this list Aegir and Ran weren't enemies of the gods and were willing to host parties for the gods. I'm including them on here anyway because these two giants were dangerous to mortals.

Suttung and Gunnlod: Suttung formerly possessed the mead of poetry which was kept in a cave gaurded by his daughter Gunnlod. Gunnlod however betrayed her father by allowing Odin to seduce her and steal the Mead of poetry. Suttung didn't catch Odin but he was never killed either and he probably still wants revenge.