Heimdallr (Ríg)

Heimdall is the watchman-god of the Æsir — the ever-vigilant guardian who stands at the rainbow bridge Bifröst, the gateway between the worlds, and keeps watch against the day the giants will come. He needs less sleep than a bird, can see a hundred leagues by day or night, and can hear the grass growing in the meadow and the wool on the sheep — the perfect sentinel. His is the horn Gjallarhorn, which he will blow to wake all the gods when Ragnarök comes and the enemies of the world come storming over the bridge. In that last battle he and Loki, ancient adversaries, are fated to kill each other. In the poem Rígsþula he also appears as Ríg, wandering the world to father the three classes of mankind. Heimdall is the corpus's image of unsleeping watchfulness — the god who waits, horn in hand, for the end he alone will be the first to see coming.