Being in Edo form seems to hamper the stronger people more than the weaker people. People like the Kage, Itachi, and even Nagato weren't really "weaker" than their alive forms.
Tobirama, on the other hand, explicitly stated that him and Hashirama were, while "close" to full power, weren't actually at full power. Considering Madara is in Hashirama / Tobirama's ballpark of power, I'd wager he was similarly affected as well. Hashirama outright says "
Tobirama, on the other hand, explicitly stated that him and Hashirama were, while "close" to full power, weren't actually at full power. Considering Madara is in Hashirama / Tobirama's ballpark of power, I'd wager he was similarly affected as well. Hashirama outright says "
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