Thanos is a villain in the Marvel Cinematic Universe. In the 2018 movie, Avengers: Infinity War, Thanos uses the infinity gauntlet and the infinity stones to try and bring his planet back from extinction. As the Avengers try to stop him from getting the mind stone of off their friend, Vision, they fail and Thanos wipes out half of the universe when he brings his planet back to life. The six infinity stones are the time stone, the mind stone, the space stone, the reality stone, the soul stone and the power stone. Quote from Thanos- "die!"