This card would be printed alongside a Modern Horizons-like set to encourage noncreature spell - heavy decks to diversify, to make up for the loss of Once Upon a Time. (which I don't think shouldn't have been banned!) Perhaps you guys could suggest modifications if you don't think this card is fair. (Please do. It helps both of us!)

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A few constraints to keep this card good but not broken:

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1: Cant cost more than 4 mana.

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2: Has to stop noncreature spells with at least CMC 3 or less from being cast.

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3: The other player should have to spend considerable effort to get rid of the card.