All Might and Izuku use One For All at 100% and combine their Detroit Smash attacks to create a smash more powerful than anything they can accomplish alone. This move is powerful enough to destroy a gargantuan steel cube several thousand times larger than All Might and Izuku. For comparison, a Detroit Smash on its own could be blocked by an iron wall created by the same villain.
All Might and Izuku first used this move to defeat Wolfram.
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