You may choose not to untap Phyrexian Gremlins during your untap step. : Tap target artifact. It doesn’t untap during its controller’s untap step for as long as Phyrexian Gremlins remains tapped.
If the Gremlins somehow become an artifact and then tap themselves, they can never be untapped during the untap phase. They must be untapped by an external effect.
04-10-2004
wotc
The target artifact can’t untap if the Gremlins and the artifact are tapped during untap, even if it is your artifact, and you plan on untapping the Gremlins.
04-10-2004
wotc
The effect does not end if the target stops being valid. For example, if it stops being an artifact.
04-10-2004
wotc
Can target a tapped artifact.
04-10-2004
wotc
Only prevents the artifact from untapping during untap step. Ones that untap during upkeep are not inhibited.
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