Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for 1.)
Ghirapur's most celebrated inventors have been immortalized in clockwork.
NM-Mint - $0.30
Lightly Played - $0.30
Moderately Played - $0.30
Heavily Played - $0.20
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 - $0.20
Damaged Non English - $0.20