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 - $2.90
Lightly Played - $2.40
Moderately Played - $2.10
Heavily Played - $1.80
Damaged - $1.50
Near Mint Spanish - $2.90
Lightly Played Spanish - $2.40
Moderately Played Spanish - $2.10
Heavily Played Spanish - $1.80
Damaged Spanish - $1.50