Primordials

The Primordials are legendary ancient beings described in The Sagas. They are generally described as being formless beings from beyond the veil, that are not fully in this world but exist as a shadow from their true self. Depictions vary from culture to culture, but they are often shown as being serpentine.

Jörmungandr
The most well known among the humans, and is described in The Sagas as being an enormous sea serpent. In more ancient times his presence, devastating events were attributed his awakening.

In mythology, Jormungandr was defeated by Thor, who in turn killed Thor during the Ragnarok Saga.

The Midgard serpent, Jormungandr once enthralled all of Midgard coiled around the entire planet. The ring around the planet is generally perceived as the skeletal remains of the Primordial, whom may one day awaken once more.

Níðhöggr
Supposedly the serpent of Niflheimr, Nidhogr is much less spoken about in The Sagas, he is said to have been consuming the ethereal ribbons from the springs of Niflheimr.

Surtr
Typhon is generally described as the most ambitious among the Primordials, seeking to become ruler of Asgard and the other worlds, he is seen as the arch nemesis to the Elves. Unlike the others, the Sagas state that Typhon fled the world, and was never defeated. In much of Coastal Elven folklore, it is said that Typhon still lurks beneath the waves on Gaia.