mtg final fantasy prompto Magic The Gathering - Universes Beyond - if at least four mana was spent to cast it Final Fantasy Variants Foil: Prompto

And there's even a politicking angle here if you choose player A and then they threaten to concede the game

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There's also a handful of other cards that increases power, mostly equipments like Champion's Helm, but most of these bump the power by about 2 and not enough to get most creatures to 7+ power

It has kept a very low price up until now because there simply hasn't been much reason to run it - although it's a removal spell you can cast repeatedly, it's just too mana intensive and target-restricted for that card advantage to be worth the cost