@satorogod
During the Kyoto Goodwill Event arc, we witness more of Gojo's prowess. He does a freakishly destructive technique called Hollow Purple which essentially wiped out miles and miles of whatever was in his path. Backtracking a little bit before that, he combined two techniques to make Hollow Purple possible—Cursed Technique Lapse: Blue and Cursed Technique Reversal: Red.