At the beginning of your upkeep, exile the top card of your library. You may play that card this turn. At the beginning of your end step, if you didn't play a card from exile this turn, create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
NM-Mint Foil - $0.60
Lightly Played Foil - $0.50
Moderately Played Foil - $0.50
Heavily Played Foil - $0.50
Damaged Foil - $0.40
NM-Mint Foil Non English - $0.60
Lightly Played Foil Non English - $0.50
Moderately Played Foil Non English - $0.50
Heavily Played Foil Non English - $0.50
Damaged Foil Non English - $0.40