St. Louis Smash Air Force (セントルイス スマッシュエアフォース, Sento Ruisu Sumasshu Eafōsu?) is a long-range version of the St. Louis Smash Super Move utilized by Izuku Midoriya using his One For All Quirk.
Izuku draws out 45 percent of his power. He then arches his leg back and performs a strong vertical roundhouse kick, firing a large blast of compressed air.
Izuku first used this technique to intercept a massive wave of crumbling debris created by Tomura Shigaraki's Decay Quirk.