Engineered Explosives [Modern Masters] Human Assassin Set: Unlimited Edition Type: Artifact

Set: Unlimited Edition Type: Artifact Rarity: Rare Cost: {4} All Swamps are 1/1 black creatures that are still lands

really big

Set: Kaladesh Inventions Type: Artifact Rarity: Mythic Cost: {3} Lands you control have "{T}: Add one mana of any color

but my host would casually push it down before I could make out what it was

Engineered Explosives [Modern Masters] Human Assassin Set: Unlimited Edition Type: ArtifactSet: Modern 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 mana value equal to the number of charge counters on Engineered Explosives.