Power Stone

Housed in the Orb hidden on the planet Morag, the Power Stone (purple) can increase the user's strength and destroy entire civilizations with a single blast. However, the stone is too much for most mortal beings to physically handle because its power will destroy them on contact. In Guardians of the Galaxy, Ronan the Accuser seeks the orb for Thanos, but Star-Lord finds and steals the orb from Morag's resting spot before Korath could. Ronan eventually steals it from the Guardians of the Galaxy. After learning about the Power Stone; however, Ronan betrays Thanos and tries to use its destructive power to destroy the planet Xandar. During the battle to protect Xandar, by sharing the burden of the Power Stone's energy, the Guardians are able to use it to kill Ronan. It's revealed that Peter Quill's half-Celestial physiology was what allowed him to withstand the Stone's power on his own for a brief time before the other Guardians joined with him. They seal the Power Stone in a new orb and entrust it to the Nova Corps for safekeeping. In Avengers: Infinity War, it is revealed that the Power Stone was the first to be obtained by Thanos, who "decimates" Xandar in the process. Thanos uses the Stone to destroy the Statesman and during the battle on Titan against Tony Stark and members of the Guardians. After Thanos uses the Stone, along with the other Stones, to wipe out half of all life in the universe, he destroys it to prevent further use.