Heimdall (Old Norse Heimdallr, the prefix Heim- means home, the affix -dallr's of uncertain origin)'s one of the Æsir (gods) in Norse mythology. Heimdall's the guardian of the gods and of the link between Midgard and Asgard, the Bifrost Bridge. Legends foretell that he'll sound the Gjallarhorn, alerting the Æsir to the onset of Ragnarök where the world ends and's reborn. Heimdall, as guardian,'s described as being able to hear grass growing and single leaves falling, able to see… (More on Heimdall)