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.
Near Mint Foil - £3.40
Lightly Played Foil - £2.90
Moderately Played Foil - £2.40
Heavily Played Foil - £1.70
Damaged Foil - £1.10
Near Mint Foil Non English - £3.40
Lightly Played Foil Non English - £2.90
Moderately Played Foil Non English - £2.40
Heavily Played Foil Non English - £1.70
Damaged Foil Non English - £1.10