IMPOSSIBLE CITY
Shortly after Captain Marvel and Iron Man recruited a new Avengers team, they received a dire warning from an ailing Kang about the Tribulation Events, a group of massively destructive cataclysms. Just as the Avengers started to believe Kang, a group of world-killing villains known as the Ashen Combine arrived on Earth and attacked, setting the first Tribulation Event into motion. The Avengers split up to deal with the Combine’s attacks around the world while Captain America (Sam Wilson) and Black Panther broke into the Impossible City, the massive ship that the Combine used to travel to Earth.
After boarding the ship as it orbited the Earth, the heroes realized the Impossible City was a sentient being who had been forced into serving the Ashen Combine. The Impossible City once belonged to another group of heroes who held the Combine as prisoners, but the villains escaped, conquered it, erased its memory, and restrained it to keep it from fighting back.
With some well-placed explosives, Black Panther broke the bonds that held the Impossible City under the Combine’s control. After the Avengers defeated the villains, the grateful Impossible City wanted to join the Avengers, and they accepted the base as their new orbital headquarters.
