At the beginning of your end step, create a tapped Powerstone token. (It's an artifact with “{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.”)
{6}: Draw a card and put a +1/+1 counter on Geology Enthusiast.
NM-Mint - $0.30
Lightly Played - $0.30
Moderately Played - $0.30
Heavily Played - $0.30
Damaged - $0.20
NM-Mint Non English - $0.30
Lightly Played Non English - $0.30
Moderately Played Non English - $0.30
Heavily Played Non English - $0.30
Damaged Non English - $0.20
Foil Prices
NM-Mint Foil - $0.50
Lightly Played Foil - $0.50
Moderately Played Foil - $0.40
Heavily Played Foil - $0.40
Damaged Foil - $0.30
NM-Mint Foil Non English - $0.50
Lightly Played Foil Non English - $0.50
Moderately Played Foil Non English - $0.40
Heavily Played Foil Non English - $0.40
Damaged Foil Non English - $0.30