last time i checked when he was useing kamui his charka was cutt drasctily.stop being a fan boy kakashi isnt killing anyone strong with that attack. which is why he hasnt killed anyone with it
If you think this way, i can also say that Amaterasu never killed someone in this manga. Anyway, you're the one who is acting really like a kid. I'm not saying Kakashi will beat everyone, you idiot. I'm only talking about what could happen "technically", but
it's not the case. Read please before posting U_U
Anyway, when was the last time he used it and his chakra was cutt that bad like you say? I don't remember. But against Deidara he used it 3times like i've said and it was when he could not even control his jutsu very well. Do you want me to show you? Against Sasuke all what i remember is when he said he was suffering because of side effects of the jutsu. That doesn't mean who could not do it again, or we're not reading the same manga