+1: Create a tapped Powerstone token. (It's an artifact with “{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.”)
−1: Pay any amount of mana. Look at that many cards from the top of your library, then put one of those cards into your hand and rest on the bottom of your library in a random order.
−7: You get an emblem with “Tap an untapped artifact you control: This emblem deals 1 damage to any target.”
Near Mint - $400
Lightly Played - $300
Moderately Played - $300
Heavily Played - $200
Damaged - $200
Near Mint Spanish - $400
Lightly Played Spanish - $300
Moderately Played Spanish - $300
Heavily Played Spanish - $200
Damaged Spanish - $200
Foil Prices
Near Mint Foil - $900
Lightly Played Foil - $700
Moderately Played Foil - $700
Heavily Played Foil - $600
Damaged Foil - $500
Near Mint Foil Spanish - $900
Lightly Played Foil Spanish - $700
Moderately Played Foil Spanish - $700
Heavily Played Foil Spanish - $600
Damaged Foil Spanish - $500