|Having acquired the Power Stone, one of the six Infinity Stones, from the planet Xandar, Thanos and his lieutenants—Ebony Maw, Cull Obsidian, Proxima Midnight, and Corvus Glaive—intercept a spaceship carrying the surviving Asgardians.[N 1] As they extract the Space Stone from the Tesseract, Thanos subdues Thor, overpowers Hulk, and kills Heimdall and Loki. Before being killed, Heimdall sends the Hulk to Earth using the Bifröst. Thanos departs with his lieutenants and obliterates the ship. Hulk crash-lands at the Sanctum Sanctorum in New York City, reverting to Bruce Banner. He warns Stephen Strange and Wong about Thanos’ plan to kill half of all life in the universe; in response, Strange recruits Tony Stark. Maw and Obsidian arrive to retrieve the Time Stone from Strange, drawing the attention of Peter Parker. Maw captures Strange, but fails to take the Time Stone due to an enchantment. Stark and Parker pursue Maw’s spaceship, Banner contacts Steve Rogers, and Wong stays behind to guard the Sanctum.