[He's been reassessing Ivar as the young man speaks, and has upgraded him in his mental directory of people here to be extremely dangerous. Skills aside, it's the lack of empathy that makes him one to watch.]

I'm not teaching you any more.

[It doesn't matter if he's trying, that's too much of a risk for Bucky.]

I've helped kill enough people, I have enough blood on my hands, I'm not giving you the tools to do it more efficiently.