They could make it so she says it as the move is preformed
Maybe, but for her to already have a spell going while saying it wouldn't make much sense. Why would she even need to say it?
IT'S A VIDEO GAME! Does performing magic make any sense? Or the fact that Kryptonian happy pill lets Joker crowbar you through a building?
No, but it should make sense within the canon. Let's just give Batman kryptonian powers why don't we? IT'S JUST A VIDEO GAME! I just think, within the canon, it should make sense for the character.
I don't need to be a comic book expert to know that Joker crowbaring Superman through a building, even if Kryptonian Magic Pills, is far from canon of the character. --- Victory does not just mean that I must succeed, but that others must fail