You may choose not to untap Phyrexian Gremlins during your untap step. {T}: Tap target artifact. It doesn't untap during its controller's untap step for as long as Phyrexian Gremlins remains tapped.
Near Mint - $0.50
Lightly Played - $0.50
Moderately Played - $0.50
Heavily Played - $0.25
Damaged - $0.25
Near Mint Non-English - $0.50
Lightly Played Non-English - $0.50
Moderately Played Non-English - $0.50
Heavily Played Non-English - $0.25
Damaged Non-English - $0.25