Board Thread:Questions and Answers/@comment-9826910-20130618064245/@comment-5657895-20130718190523

That's exactly it I think. Berci rammed Eijisai repeatedly with that Bankai and wasn't even able to dent him. The first time Sasakibe used it against Eijisai in his prime he scarred his face permanently. Seems to me only the highest ranking Stern Ritter can use Bankai to an effective level, like Yhwach, Haschwalth, and Col. Sanders.