Kill Switch 
Artifact
, 
: Tap all other artifacts. They don't untap during their controllers' untap steps for as long as this artifact remains tapped.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Artifact
, : Tap all other artifacts. They don't untap during their controllers' untap steps for as long as this artifact remains tapped.