Engineered Explosives [Fifth Dawn] SM241 your opponent discards 3 random

your opponent discards 3 random cards from their hand

If this card is destroyed in the Spell & Trap Zone: You can Special Summon 1 "Ancient Gear" monster from your hand or Graveyard

As Steam Vents enters the battlefield

and ponderings

Set: World Championships 2013 Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

Engineered Explosives [Fifth Dawn] SM241 your opponent discards 3 randomSet: Fifth Dawn Type: Artifact Rarity: Rare 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.