As Thanos begins to activate the completed Infinity Gaunlet, he is attacked by Thor who is able to severely wound him with his new axe Stormbreaker, but is unable to stop Thanos from activating the gauntlet despite the injuries he inflicted on Thanos. As half of all life across the universe disintegrates, including White Wolf, Black Panther, Groot, Scarlet Witch, Falcon, Mantis, Drax, Star-Lord, Doctor Strange and Spider-Man; Thanos teleports away to an unknown planet to recover from the wounds inflicted by Thor. Let stunned by their inability to stop Thanos and the deaths of their friends; The remaining heroes Iron Man, Nebula, Bruce, M'Baku, Okoye, War Machine, Rocket, Steve, Black Widow, and Thor are left on their respective battlefields of Wakanda and Titan are wondering what to do next.
The practice may have originated in a Celtic festival, held on 31 October–1 November, to mark the beginning of winter. It was called Samhain in Ireland, Scotland and the Isle of Man, and Calan Gaeaf in Wales, Cornwall and Brittany. The festival is believed to have pre-Christian roots. After the Christianization of Ireland in the 5th century, some of these customs may have been retained in the Christian observance of All Hallows' Eve in that region—which continued to be called Samhain/Calan Gaeaf—blending the traditions of their ancestors with Christian ones. It was seen as a liminal time, when the spirits or fairies (the Aos Sí), and the souls of the dead, could more easily come into our world. It was believed that the Aos Sí needed to be propitiated to ensure that the people and their livestock survived the winter.