+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 - $900
Lightly Played - $700
Moderately Played - $700
Heavily Played - $600
Damaged - $500
Near Mint Spanish - $900
Lightly Played Spanish - $700
Moderately Played Spanish - $700
Heavily Played Spanish - $600
Damaged Spanish - $500
Foil Prices
Near Mint Foil - $900
Lightly Played Foil - $700
Moderately Played Foil - $600
Heavily Played Foil - $500
Damaged Foil - $500
Near Mint Foil Spanish - $900
Lightly Played Foil Spanish - $700
Moderately Played Foil Spanish - $600
Heavily Played Foil Spanish - $500
Damaged Foil Spanish - $500