Strange discovers the truth behind Shuma-Gorath, that his coming to Earth is powered through the Ancient One. As this evil entity currently resides in the Ancient One's mind this is where Stephen Strange heads to confront him. He soon learns Shuma-Gorath is supreme in his mentor's mind, which leaves him with but one choice to save all of Earth. Doctor Strange heads to the part of his master's mind that houses the Ego. There Strange snuffs it out killing the Ancient One and ending the threat of Shuma-Gorath. Afterwards, as Strange laments over his actions the Ancient One appears to him throughout all manner of life and explains he's moved on to a higher plane of existence and must leave to attend to his new powers. Before doing so he bequeaths his remaining powers to Strange making him the new Sorcerer Supreme!