Board Thread:Questions and Answers/@comment-9826910-20130618064245/@comment-11051098-20130718203440

Yeah, Yamajii got a scar on his forehead, and Sasakibe developed and likely increased the power of Kôkô Gonryû Rikyû over the hundreds of years it seems passed since he achieved and mastered it.

Berci stole it, used it, but he couldn't even injure Yamajii, so it seems the power Berci displayed was weaker than the power Sasakibe could use hundreds of years ago.

Äs seemed to display quite much of Senbonzakura Kageyoshi's power, but Kôkô Gonryô Rikyû was probably many levels above in terms of power. So Äs could have been able to use all or close to all of the power he stole, but Berci was apparently far too weak to use the full potential.