"What was my quirk!" Deku shouts breaking Dr Kyudai back

Deku the second he sees Dr Kyudai working for All for One he immediately knows "Oh I'm not quirkless!" And fucking folds the guy like a origami swan.

"WHERE IS IT?! WHERE'S MY QUICK?! WHAT DID YOU TAKE FROM ME?!" Izuku is throwing him through buildings and straight up going for kill shots.

"Young Midoriya stop!" All Might restrains Izuku but then The Dr Reveals what quirk was taken from Izuku as a kid and All Might gasps, lets Izuku finish beating the shit out of him and holds Izuku blood covered body as he cries.

What was the quirk?