Heimdall

Background
Heimdall was one of the Aesir gods of Asgard. He guarded the bifrost and watched over the citizens of Yggdrasil before the events of Ragnarok.

Ragnarok
Heimdall watched as Surtyr and his army of giants from Jotunheim marched against Asgard. He sounded the Gjallarhorn and began Ragnarok. He defeated the traitor god Loki and fled to Vanaheim, wounded and discouraged.

The War Against Surtyr
After Ragnarok, Heimdall returned to Asgard to find the sons of Thor, Magni and Modi. He joined them in creating the new Asgardian Empire. After Magni created a plan to attack Surtyr's army, Heimdall took command of his Vanir warriors, and led them amongst the Asgardians, led by Magni, and the Jotunn, led by the giant Ortyr.

The armies met in Midgard. Surtyr's army, versus the Jotunn, Asgardians, and The Vanir. Soon after the battle begun, the Draugr king, Ferfeffnir joined in the battle. Surtyr was defeated, and Heimdall had killed Ferfeffnir. Heimdall returned to Asgard with Magni and Modi to discuss the next move.