Unstable Polymorph
![Unstable Polymorph](/img/ccc/ren/12778/110237.jpg?t=2023-07-10-20:18:11)
Instant
As an additional cost to cast this spell, sacrifice a creature. Exile cards from the top of each player's library until you exile a card with the same mana value as the sacrificed creature. You may cast those spells without paying their mana costs.
"Let's see what we get!"
— Blibble, the Fleeting
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