Ulamog, the Defiler [Modern Horizons 3] Legion Rare you may pay (C)

you may pay (C)

Each booster pack contains 12 randonly inserted game cards

They likely refer not to one mage

Set: Phyrexia: All Will Be One Commander Type: Instant Rarity: Rare Cost: {2}{W}{W} Convoke

and boost this unit with all of your back row [Stand] units with "Boost"

Ulamog, the Defiler [Modern Horizons 3] Legion Rare you may pay (C)Set: 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.