Tyr was the eldest son of Odin, firstborn after Aldrif and originally the God of War and of Heroic Glory in Asgard famous for his courage.
When Heven waged war on Asgard, Tyr was still newborn child. Together with his sister Aldrif was kept safe on Asgard. During a battle Queen of Angels snuck into Asgard and decided to kidnap little Aldrif.
At one stage, the gods of Asgard were so afraid of the wolf Fenris that they decided to shackle him. However, Fenris was so strong that he could break any chain they put on him. The dwarves were paid by the gods to build a magical ribbon, Gleipnir, from the roots of a mountain and the beard of a woman, and the gods asked Fenris to let them tie him up with Gleipnir as a game. But Fenris noticed the fear in the gods and knew they were trying to deceive him. He then accepted to be bound if one of the gods accepted to put their hand in the his mouth, just in case. Tyr was the only god who agreed. As soon as Fenris understood that he was trapped, he ate Tyr's hand.
Thus, Fenris was tied and will remain that way until the day of Ragnarok. Tyr would be known as the Leavings of the Wolf since (This is understood as a myth of the glory, the name undying after the body's death).
Later, a new god named Thor was born and became the new defender of Asgard, replacing Tyr in that role. Tyr has been resentful since. He distanced himself from his fellow gods only appearing when Asgard was in danger. His presence came to be seen as a sign that battle and the chance for glory were near.
Tyr was a victim of cuckoldry and mocked by Loki at one moment.
Tyr has sometimes rebelled against Odin due to his jealousy towards Thor. However, he joined the other gods in defending Asgard from various threats such as Surtur and Seth. Eventually, he made peace with Odin and Thor and was welcomed back into Asgard.
Tyr is destined to kill and be killed by Garm, the guard dog of Hel, on the day of Ragnarok. However, the two poetic versions of Ragnarok make no mention of Tyr, and this is only said in the prose version. Tyr died when Thor initiated a final Ragnarok.
Tyr was among the Asgardians revived by Thor. He was summoned to be one of Balder's chief counselors following Thor's banishment for killing Bor. Tyr still resented Thor and often suggested a more violent approach to conflicts. Upon warnings of the coming Siege from a seer Tyr dismissed humans as being any threat or the prophecy of the God of War dying during the battle. Upon realizing the warnings were true Tyr vowed to fight fate. During the battle Tyr was given charge of Asgard's forces when Balder and Heimdall left to look for Loki. Tyr in an act of cowardice left the front lines claiming to go look for anybody else in the hospital that could wield a sword. Discovering the dead Olympian War god Ares and the prophecy referred to him Tyr was ashamed of himself and returned to the battle. He was momentarily struck down and as a spirit fought the Disir alongside with the Valkyrie Dani Moonstar. He was returned to life and after the battle cursed himself both for his cowardice and his failure to prepare for Siege.
Tyr later redeemed himself by accompanying Thor on a mission to Hel to protect the Asgardian dead from the Disir. It was revealed that Tyr is somewhat superstitious and trying to fight intangibles like Fate or the Disir frightened him. However, he refused to back down and figured out a way to hurt the Disir holding them off long enough for Thor to retrieve the one weapon that could stop them.
Tyr, still reeling from his cowardice, joined Balder in a suicide mission against the Ano-Athox. He was struck down in the battle. After his death, Tyr became a general of Hela. This was in return for her lending aid to Balder who was trying to keep Surtur trapped in limbo. Tyr participated in Loki's mission against the Serpent. Afterwards, he returned to Hel.
Not too long after Hela was overthrown by Odin's secret long-lost firstborn Angela and she handed over the crown to Balder, Niffleheim was invaded by the ruler of Muspelheim, Sindr the Queen of Cinders, as part of an alliance between her and Malekith the Accursed during the War of the Realms. Despite fighting by Balder's side, Tyr regarded him as a false king, and plotted to facilitate the return of Hela to the throne. When Thor and Loki traveled to Niffleheim to stop Malekith's plans, Tyr tricked them and Balder into intercepting a transport that was returning Hela to Hel as a prisoner of Sindr.
Balder and Hela agreed to marry for tactical purposes in order to unify their followers.[9] The ceremony was disrupted by Sindr and her army. Thor recruited the Einherjar and the Valkyrior to fight for Nifflehim, and he defeated Sindr, forcing her to retreat and return to Muspelheim. The dispute for the crown was solved when Balder's lover Karnilla decided to take his place in the altar and married Hela to spare him from the sacrifice. Following the reluctant union, Tyr was taken to Valhalla.
Forced to serve food and alcohol to the Einherjar, Tyr befriended the oldest denizens of Valhalla and learned of the R�kkva - a primordial font of eldritch darkness and antilife - and came to covet it for himself. After Jane Foster became the new Valkyrie, Tyr escaped Valhalla using an Urdoor and travelled to the Barren Mountains in Jotunheim. Unable to break the seal on the chamber containing the R�kkva, Tyr exhumed the corpse of the ancient Asgardian king �de - who had previously bonded to it.
Taking �de's corpse to a cave deep in the Earth's mantle, Tyr attempted to resurrect him with the sap of Yggdrasill, intending for Jane Foster to face �de in combat so that her Undrjarn would manifest the long-extinct divine white wood of Fiererheim - the one thing capable of breaking the seal on the R�kkva. Due to the R�kkva having destroyed �de's soul, the ritual backfired and instead unleashed the remnants of the R�kkva in �de's corpse on Midgard. Thor was infected by the R�kkva, but Jane Foster managed to destroy �de's corpse using Undrjarn, which manifested a spear made from the white wood of Fiererheim.
His plan successful, Tyr stole Undrjarn and returned to Jotunheim with Thor in tow. Despite Loki attempting to intervene, Tyr was able to use Undrjarn to break the seal on the R�kkva, belatedly realizing that it would only obey him as long as he held Undrjarn's white wood spear.
Tyr proceeded to attack Asgard infecting his former friends and allies with the R�kkva. During the battle Jane went toe-to-toe against Tyr who stabbed her with her own weapon. However, this allowed Jane to take back Undrjarn and defeat the R�kkva, while Tyr escaped. Returning to Jotunheim he fell unconscious and was found and taken by Loki.
