Engineered Explosives (Topper) [Ultimate Masters Box Topper] noPrice Whenever you cast a Zombie

Whenever you cast a Zombie spell

Set: Urza's Saga Type: Artifact Creature — Phyrexian Golem Rarity: Rare Cost: {7} Phyrexian Colossus doesn't untap during your untap step

Set: Unlimited Edition Type: Creature — Cockatrice Rarity: Rare Cost: {3}{G}{G} Flying

Summoned from the dreamrealms

Set: Amonkhet Promos Type: Creature — Dragon Rarity: Rare Cost: {3}{R}{R} Flying

Engineered Explosives (Topper) [Ultimate Masters Box Topper] noPrice Whenever you cast a ZombieSet: Ultimate Masters Box Topper Type: Artifact Rarity: Mythic Cost: {X} Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.) {2}, Sacrifice Engineered Explosives: Destroy each nonland permanent with mana value equal to the number of charge counters on Engineered Explosives.