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 - $1.25
Near Mint Non-English - $1.25
Lightly Played - $1.00
Lightly Played Non-English - $1.00
Moderately Played - $1.00
Moderately Played Non-English - $1.00
Heavily Played - $0.75
Heavily Played Non-English - $0.75
Damaged - $0.50
Damaged Non-English - $0.50