Engineered Explosives [Double Masters] World Championship Decks 1997 or Forest card and put

or Forest card and put that card onto the battlefield

Termenidae

It enters the battlefield with twice that many +1/+1 counters on it

Use this ability only during your upkeep and only once each upkeep

Set: War of the Spark Type: Legendary Planeswalker — Karn Rare Cost: {4} Activated abilities of artifacts your opponents control can't be activated

Engineered Explosives [Double Masters] World Championship Decks 1997 or Forest card and putSet: Double Masters 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 converted mana cost equal to the number of charge counters on Engineered Explosives.