I'll wait for the viz. Honestly I really hope it was Kidd, cause otherwise wtf did he even do? I originally assumed before the chapter dropped that Law was weakening her enough from the inside to the point where Kidd could deal damage/break bones with brute force. If Law did both of those things, what in the actual fuck were Kidd's attacks doing? It was bad enough Big Mom ignored his attack to talk about Law right after Kidd landed his attack.