Engineered Explosives [Kaladesh Inventions] SM99 Set: HeartGold & SoulSilver: Base

Set: HeartGold & SoulSilver: Base Set Type: Grass Rarity: Holo Rare Retreat cost: Colorless

you might as well trade it for something else

Set: Black & White: Black Star Promos Type: Lightning Rarity: Black Star Promo Retreat cost: 0

and "Cyberdark Keel" from the field

• 1 or fewer: This card loses 400 ATK

Engineered Explosives [Kaladesh Inventions] SM99 Set: HeartGold & SoulSilver: BaseSet: Kaladesh Inventions 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 converted mana cost equal to the number of charge counters on Engineered Explosives.