At the beginning of your upkeep, you may put a fuse counter on Powder Keg. {T}, Sacrifice Powder Keg: Destroy each artifact and creature with converted mana cost equal to the number of fuse counters on Powder Keg.
Near Mint - $6.75
Lightly Played - $6.50
Moderately Played - $5.50
Heavily Played - $4.25
Damaged - $3.50
Near Mint Non-English - $6.75
Lightly Played Non-English - $6.50
Moderately Played Non-English - $5.50
Heavily Played Non-English - $4.25
Damaged Non-English - $3.50