When Riveting Rigger enters the battlefield, you may sacrifice another artifact. If you do, put two +1/+1 counters on Riveting Rigger and it assembles a Contraption. (Put the top card of your Contraption deck face up onto one of your sprockets.)
"Turn a blender into an arc welder with a portable fusion reactor and a frozen yogurt dispenser? We can do it!"
NM-Mint - $0.25
Lightly Played - $0.23
Moderately Played - $0.20
Heavily Played - $0.17
Damaged - $0.13
NM-Mint Non English - $0.25
Lightly Played Non English - $0.23
Moderately Played Non English - $0.20
Heavily Played Non English - $0.17
Damaged Non English - $0.13
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