I think there's a plothole, how does Kisame infusing his chakra into a sacrifice allow that sacrifice to magically grow Samahada? (Kisame's sword that shaves). It's not like it's a sword made out of chakra that he than materialize. Maybe the sacrifice was given the actual sword, and when he died, like in a previous episode Kisame recalled his sword away from Gai after it pierced his hands, just like Harry Potter summoning his broom? >_>