Engineered Explosives (Topper) [Ultimate Masters Box Topper] Mountain Plains Set: Lorwyn Type: Creature —

Set: Lorwyn Type: Creature — Treefolk Druid Rarity: Uncommon Cost: {4}{G} When Seedguide Ash dies

or Forest card and put that card onto the battlefield

Set: Unhinged Type: Artifact Rarity: Rare Cost: {6} When Letter Bomb enters the battlefield

except it doesn't copy that creature's color and it has "At the beginning of your upkeep

Engineered Explosives (Topper) [Ultimate Masters Box Topper] Mountain Plains Set: Lorwyn Type: Creature —Set: 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.