Excavation Explosion{2}{R}
Sorcery
Excavation Explosion deals 3 damage to any target. Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
Urza's engineers could take weeks to dig out a powerstone. The goblins weren't so painstaking.
Artist: Campbell White