sound to alert all of Asgard to dangers threatening the city's gates, functioning even on Midgard and capable of being heard by any and all Asgardians on the planet when sounded. While in the mortal form of Donald Velez he wore enchanted glasses which granted him super-enhanced vision. He possesses the golden-maned steed named Golltoppr ("Golden Top"). Heimdall is armed with an enchanted uru sword that has, on at least one occasion, allowed him to mystically disguise himself as a normal human while on Earth. It is said by Heimdall to contain "all the cosmic force of the universe" has also been shown capable of projecting "the blue flame from countless cosmic suns", used both times to battle Thor, and enabled Heimdall to directly best the Thunder God the first time when the latter's strength was halved. Heimdall has also at least once wielded the powerful Sabre of Sorcery, which projected blasts of mystic energy and/or fire, against the Hulk when the latter was invading Asgard, but was unable to prevent him from entering the Realm Eternal. Other versions Earth X In the alternate Earth X reality, the Asgardians were actually aliens that were manipulated by the Celestials into believing they were the Gods of Norse myth. When the lie was revealed, "Heimdall" and the other Asgardians briefly resumed their alien form, but later returned to their Asgardian forms. Guardians of the Galaxy In the Guardians of the Galaxy timeline, Heimdall is still alive and well in the 31st Century. He battled Starhawk and Aleta on the Bifrost Bridge. Thor: The Mighty Avenger In Thor: The Mighty Avenger #6, Heimdall, much like his Marvel Universe incarnation, appears as the guard of the Bifrost bridge, sports a goatee and wears a horned helmet that casts his eyes in shadows. Heimdall is ordered by Odin to keep Thor from returning to Asgard. He is also revealed as the one who separated Thor from his hammer. When Heimdall threatens to send Jane Foster to some distant planet where Thor could never find her if he continues trying to force his way into Asgard, Thor ends his attempt. Ultimate Marvel Heimdall first appeared in the Ultimate Marvel universe when he is confronted by Loki (disguised as Baron Zemo), who shot and killed him. He was guarding the Bifrost. In other media Television Heimdall appears in The Super Hero Squad Show, voiced by Steve Blum