Vona's Hunger [Rivals of Ixalan Prerelease Promos] Fate Reforged Clash Pack put a charge counter on

put a charge counter on Door of Destinies

then sacrifice it unless you pay its upkeep cost for each age counter on it

When Emrakul

Criosphinx Sovereign or another Sphinx enters the battlefield under your control

untap Mana Vault

Vona's Hunger [Rivals of Ixalan Prerelease Promos] Fate Reforged Clash Pack put a charge counter onSet: 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.