Avengers: Infinity War
Having destroyed Xandar which was a sanctuary for the Power Stone under the guard of the Nova Corps and deciding to claim the rest of the Infinity Stones, the Mad Titan Thanos attacks the Asgardian refugee vessel Statesman with his children. Half of the Asgardians are slaughtered while Thor, Loki and Heimdall are defeated. Other Asgardians on Statesman fled the onslaught; such as Valkyrie in escape ships and were among the half spared by Thanos. Thanos, already wielding the Power Stone upon his Infinity Gauntlet, forces Loki into manifesting the Tesseract by threatening to kill Thor. Despite Hulk's attempt to defeat Thanos, the Green Monster is quickly overpowered and defeated. Heimdall uses his last shred of Dark Magic to summon the Bifrost Bridge, which sends the Hulk to Earth.