Heimdall is the brother of the warrior Sif. He is the all-seeing and all-hearing guardian sentry of Asgard, he stands on the rainbow bridge, Bifrost and stands watch for any attacks to Asgard. He partly won the role through using his eyesight to see an army of giants several days' march from Asgard, allowing them to be defeated before they reached Asgard, and making their king a prisoner.[volume & issue needed] For ages, he stood as the guardian of Asgard, defending the city's gates from any intruders, and was one of the most trusted servants of Odin.In his first appearance, Heimdall accidentally releases Loki when he causes Heimdall to shed a tear using a leaf. Later Hemidall warned Odin of a Vanna's reconnaissance of Asgard.[1] When next seen, he battled Thor to prevent him from entering Asgard;[2] He then battled Thor to prevent him from leaving Asgard.[3] Heimdall was then immobilized by Seidring in a cube of ethereal force when Seldring stole the Odinforce.[4] Some time later, he encountered the Recorder.[5]Later still, Heimdall battled Thor at Loki's command.[6] In the prophesy of Ragnarok, he severed the Rainbow Bridge, and sounded Gjallarhorn.[7] He traveled to Earth with Kamorr the dwarf to search for human candidates for godhood.[8] He gathered three such human beings, and arranged for them to be exposed to Ego-Prime's energies and become the first three Young Gods.[9] Heimdall then accompanied the Asgardians into the Dark Nebula.[10]Heimdall later became afflicted by lethargy in one of Odin's absences from Asgard.[11] He then blew Gjallarhorn to summon Odin's elite guard.[12] Some time later, he summoned Asgardian troops to restrain Thor.[13] Later, he battled Thor again to prevent him from bringing mortals into Asgard.[14]When Asgard was invaded by the fire demon Surtur, Heimdall attempted to defend the gates, but was overcome, and the Rainbow Bridge was shattered.[15] No longer needing to be stationary, Heimdall spent more time in Asgard. Heimdall is given the Great Scepter of Odin to guard by Loki.[16] Heimdall discovered Malekith's escape. He fetched Amora the Enchantress to help free Thor from ensorcelment. Heimdall later learned of Loki's possession of Surtur's sword.Heimdall became close to Amora, who was soon infatuated with him. He comforted Amora about the Executioner's death.[20] Heimdall rescued Balder from Seth's assassins.[21] Heimdall was gravely injured during the war with Seth, the Egyptian god of death, when he was struck down in battle with the legions of Seth.[22] Heimdall later battled Sif. Leir, and Caber.[23] Heimdall confronted Surtur disguised as Odin about the imprisoned Grand Vizier.[24] Heimdall led the legions of Asgard into battle against Ymir.[25]When Odin returned to Asgard after Surtur's defeat, he gave a portion of his power to Heimdall to restore the Rainbow Bridge, and Heimdall resumed his dutiesFrom Wikipedia