For ten points, name this guardian of the bridge Bifrost who will blow his horn at Ragnarok.
He was responsible for the existence of slaves, peasants, and nobility, causing the births of the progenitors of each class by visiting in turn three houses while disguised as Rig. Gifted with great senses of hearing and sight, he slept less than a bird as he was required to stay alert. For ten points, name this guardian of the bridge Bifrost who will blow his horn at Ragnarok.
He was responsible for the existence of slaves, peasants, and nobility, causing the births of the progenitors of each class by visiting in turn three houses while disguised as Rig.
{Heimdall}