I'm thinking of a card that can do this:
- I have Niv-Mizzet, Parun on the battlefield.
- Opponent casts Aether Gust on Niv-Mizzet. Niv-Mizzet triggers.
- Usually the trigger would resolve before Aether Gust. Instead I cast [mystery card] (or activate [mystery ability]) which rearranges the stack to make Aether Gust resolve first, which allows Niv-Mizzet to draw itself.
Does the mystery card/ability exist? Using the Scryfall database, I'm not getting results for the words "rearrange" and "stack", but it's possible I'm looking for the wrong words.