Karn, the Great Creator [War of the Spark Prerelease Promos] Unlimited Edition who did in Alrok

who did in Alrok

Equip {4} ({4}: Attach to target creature you control

Set: Ultimate Masters Box Topper Type: Legendary Creature — Eldrazi Rarity: Mythic Cost: {10} When you cast this spell

Sacrifice Engineered Explosives: Destroy each nonland permanent with mana value equal to the number of charge counters on Engineered Explosives

Set: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {2} Each spell costs {3} more to cast except during its controller's turn

Karn, the Great Creator [War of the Spark Prerelease Promos] Unlimited Edition who did in AlrokSet: War of the Spark Prerelease Promos Type: Legendary Planeswalker Karn Rarity: Rare Cost: {4} Activated abilities of artifacts your opponents control can't be activated. +1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value. 2: You may reveal an artifact card you own from outside the game or choose a face up artifact card you own in exile. Put that card