Kvasir

Kvasir was the Norse god of wisdom. He was made from the spit from every god after the Aesir-Vanir War. He was killed by the dwarves Fjalar and Gjalar.

History
Kvasir was created as a peace treaty after the Aesir-Vanir war. He aided Odin, Frey and Heimdall in tracking down Loki after the trickster killed Balder. He deduced that Loki has taken the form of a fish after finding the indentation of a net in the ashes of his fire. The dwarf brothers Fjalar and Gjalar lured him into their cave and killed him.

The Ship of the Dead
Magnus Chase dreams of him helping the gods fin Loki and of the god's demise.