Artifact, 3 (3)
Rare
{2}, {T}: Tap all other artifacts. They don't untap during their controllers' untap steps for as long as Kill Switch remains tapped.
Success is largely a matter of knowing which lever to pull.
Illus. Brian Snõddy

10/4/2004: Note that you can't choose to leave this card tapped during your untap step (unless some other effect says so).
10/4/2004: Only the artifacts that it tried to tap when the ability resolved are prevented from untapping. Artifacts that enter the battlefield after that or permanents that become artifacts after that are not affected.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Commander