Move Creation Workshop

[Amaterasu]

I'm just going to say that lethal moves, even tied to conditions, are a no-no unless you want to make a fluff move that your character can use to finish off their defeated opponents post-fight. 

I'd have to disagree. While you can't make insta-kill moves or super moves, I'd definitely argue that you can add a clause that says, if you've already won a fight or the person is "mortally wounded" the move can be used to finish them off. My Consume Essence is like that. It isn't lethal, but if I drain someone on the verge of death (meaning I've won the fight and I get to kill them now) Trixie could drain them completely and kill them with said move.

EDIT: What I mean is there isn't a need for a fluff move. Just add a sentence that says it can kill for you in the event of a fight win.

Trixie is correct in this case. There are examples of moves with that detail already.

Sorry if I was unclear, but yes - Trixie is correct, I am aware of that. What I meant to say is that a regular move cannot insta-kill during a fight, but there is no problem with a move having lethal effects if you use it on an opponent after a fight that you have won to kill them. Sorry if I caused any confusion.