At the beginning of Avengers: Infinity War, Josh Brolin’s Thanos was already in possession of the Power Stone, which was last seen in Guardians of the Galaxy being locked in the Nova Corps’ vault. However, unlike all the other Infinity Stones, we never saw the Mad Titan obtain this purple-colored gem, and only know that he ravaged Xandar to do so. According to Thanos creator Jim Starlin, there was a 45-minute sequence in Infinity War that would have shown this, but it was removed for a specific reason.
