Ulamog, the Defiler (Retro) [Modern Horizons 3] SWSH067 you may put a charge

you may put a charge counter on Aether Vial

Set: Neo Revelation Unlimited Type: Metal Rarity: Rare Retreat cost: Colorless

Set: Diamond & Pearl: Great Encounters Type: Darkness Rarity: Holo Rare Retreat cost: Colorless

Set: Modern Horizons 3 Type: Artifact Rarity: Rare Cost: {2} Black spells you cast cost {1} less to cast

] Whenever a card is put into your inkwell

Ulamog, the Defiler (Retro) [Modern Horizons 3] SWSH067 you may put a chargeSet: Modern Horizons 3 Type: Legendary Creature Eldrazi Rarity: Mythic Cost: {10} When you cast this spell, target opponent exiles half their library, rounded up. WardSacrifice two permanents. Ulamog, the Defiler enters the battlefield with a number of +1 +1 counters on it equal to the greatest mana value among cards in exile. Ulamog has annihilator X, where X is the number of +1 +1 counters on it.