Crack in Time (Surge Foil) [Doctor Who] Ravnica Allegiance Ravnica Weekend {T}: You may put a

{T}: You may put a creature card with mana value equal to the number of charge counters on Aether Vial from your hand onto the battlefield

with a focus on farming

Preposterous city

{1}{W}{U}: Exile Stenn

Crack in Time (Surge Foil) [Doctor Who] Ravnica Allegiance Ravnica Weekend {T}: You may put aSet: Doctor Who Type: Enchantment Rarity: Rare Cost: {3}{W} Vanishing 3 (This enchantment enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) When Crack in Time enters the battlefield and at the beginning of your precombat main phase, exile target creature an opponent controls until Crack in Time leaves the battlefield.