Kill Switch

three generic mana Artifact

two generic mana , tap this permanent : Tap all other artifacts. They don't untap during their controllers' untap steps for as long as this artifact remains tapped.

Success is largely a matter of knowing which lever to pull.

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Showing Nemesis#133

Price

4.19 $

Foil 38.96 $

8 printings

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Kill Switch rulings

2004-10-04
Note that you can't choose to leave this card tapped during your untap step (unless some other effect says so).
2004-10-04
Only the artifacts that it tried to tap when the ability resolved are prevented from untapping. Artifacts that enter after that or permanents that become artifacts after that are not affected.