Thanos wreaked havoc on the Marvel Cinematic Universe with the help of the Infinity Stones, but there’s one he used just once — and it was the most devastating thing he ever did. The threat of Thanos loomed large over the MCU for its first three phases, and it came to a head during Avengers: […] The post Thanos Only Used 1 Infinity Stone Once & It Was Still The Most Devastating Thing He Did appeared first on ComicBook.com .