Vona's Hunger [Rivals of Ixalan Prerelease Promos]

Set: Rivals of Ixalan Prerelease Promos Type: Instant Rarity: Rare Cost: {2}{B} Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)Each opponent sacrifices a creature. If you have the city's blessing, instead each opponent sacrifices half the creatures they control, rounded up.