Powder Keg 136 (Urza's Destiny)

At the beginning of your upkeep, you may put a fuse counter on this artifact. {T}, Sacrifice this artifact: Destroy each artifact and creature with mana value equal to the number of fuse counters on this artifact.

NM - $136.60
LP - $109.30
MP - $82.00
HP - $54.70
DMG - $27.30