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 - $5.25
Lightly Played - $5.00
Moderately Played - $4.25
Heavily Played - $3.00
Damaged - $2.50
Near Mint Non-English - $5.25
Lightly Played Non-English - $5.00
Moderately Played Non-English - $4.25
Heavily Played Non-English - $3.00
Damaged Non-English - $2.50