The Battle at the Gates of Eternity was a final confrontation between Thor and Mighty Thor against Gorr the God Butcher, during his attempt to get the Eternity to end the existence of the gods.
Background[]
Gorr accidently came across the deity Rapu whom he had worshipped all his life, but instead of the reward that was promised for the faithful, he found mockery for his devotion and his daughter's death. He held All-Black the Necrosword and killed Rapu with it, vowing to kill all gods and receiving a vision about reaching Eternity with the Bifrost Bridge to kill all of them.
Gorr learnt about Thor's weapon, Stormbreaker, and its capabilities to access the Bifrost, so he kidnapped a group of children from New Asgard to lure Thor into a trap and claim the weapon. Thor confroned Gorr in the Shadow Realm, and as he vanquished Thor's allies, he managed to steal Stormbreaker and fling Thor away, finally armed with what he needed to finish his plan.[2]
Battle[]
Now close to completing his plan, Gorr the God Butcher teleported himself and the Asgardian children to the Gates of Eternity with Stormbreaker. Once there, Gorr planted Stormbreaker into the ground with Shadow Creatures tentacles before using Stormbreaker to unleash a stream of Bifrost energy to unlock the Gates. Now having no use for the kids, Gorr attacked a giant statue of the One-Above-All which could crush the kids to death. However, Thor used Zeus' Thunderbolt to teleport himself there and used his strength to break the Statue.
Noticing Thor's newest attempt to stop him when he was so close to his goal, Gorr summoned legions of Shadow Monsters to finish the God of Thunder and the children; Thor, however, briefly imbued the kids with his powers to take down the Monsters while he dealt with Gorr and tried to free Stormbreaker with Thunderbolt, in order to begin to crack apart the Sword.
Eventually Gorr threw Thor to the ground and attempted to impale Thor with the Necrosword, only for Mjølnir to knock Gorr off of him and being faced by Mighty Thor.
Now having to deal with both Thors, with Thor finally freeing Stormbreaker, but it already having opened the path to Eternity, Gorr tried to take on Mighty Thor one-on-one, mocking her by calling her "Lady Thor," however Mighty Thor told Gorr to either call her Mighty Thor or Dr. Jane Foster before using Mjolnir to finally break apart the Necrosword and capture the shards into Mjolnir. Not relenting Gorr began to use the hilt of the Necrosword to summon each shard back into the Sword.
However, Mighty Thor realized this and use immense levels of lightning to vaporize the shards, causing the hilt and the sword to be destroyed for good, depowering Gorr and slowly killing him. Now with nothing left Gorr crawled his way to the gateway, as the kids went home with Stormbreaker. While Thor and Mighty Thor tried to stop Gorr, he successfully entered into Eternity's realm, taking Thor and Mighty Thor with him.
Gorr making a wish
Now standing before Eternity in an open watery plane, the powerless Gorr, now retaining his original appearance, made his way to the entity. However, once Thor told him not to do this, Gorr asked him what kind of father would he be if he stopped. Thor explained that he felt his pain but that it shouldn't be the way saying that he does not feel that Gorr was not looking for death and revenge. Gorr angrily questioned what did he seek, which Thor asked him to choose love, stating that he was not going to use his last moments to fight Gorr, instead he went to care for the weakened Jane Foster.
Gorr began to slowly succumb to the side effect of wielding the All-Black the Necrosword, saying that she would not have someone to look after. But Foster told Gorr that his daughter would not be alone. Knowing what she meant, Gorr asked Eternity to revive his daughter, which he did. With his daughter now in Eternity's place Gorr hugged her, as he and Foster were passing away. Turning to Thor, Gorr asked for Thor to raise his daughter, before finally dying in the cosmic oasis, leaving Thor and Gorr's daughter.[2]
Aftermath[]
Thor fulfilled his promise to Gorr to raise his daughter, which also filled in the void that Thor had been feeling for years as now he had someone to care for. The child developed godly powers, so Thor equipped her with Stormbreaker to bring her into battle with him, to ensure peace across the galaxy, becoming known as the duo Love and Thunder.[2]