Engineered Explosives (Future Sight) [Mystery Booster 2]

Set: Mystery Booster 2 Type: Artifact Rarity: Rare Cost: {X} Sunburst (This enters 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.