Worst case, it's just a Cruel Edict, and given the flexibility of accessing the creature as well, that's a great deal to take
Or maybe Embraal Gear-Smasher to do some damage
This makes the card much more appealing in Fire Lord Azula and Noctis, Heir Apparent shells, for example
Honorable Mentions: Flash Cards with flash arent technically instants, but they fill a similar role because they give you flexible cards that you can deploy when most convenient, often by disrupting your opponents
Your best choice is to use asymmetrical stax effects like Narset, Parter of Veils, but you can also counter symmetrical effects with some reduction of your own
That said, the decks themselves have a pretty hefty price tag, and we dont know the allocations yet