Tyrant's Machine

Two mana to deploy, four mana plus the tap to fire: this is the tapper effect stripped of its body and welded onto a colorless artifact, the inheritor of what creatures like Master Decoy once carried on a frame that could block, attack, and die to a burn spell. Pulling "tap target creature" off a creature and onto an artifact buys two narrow things: the effect dodges creature removal entirely, and it answers threats in any color without asking the deck to run one. What it surrenders is everything else. This tapper does not attack, does not block, does not pressure life totals; it sits in play and neutralizes exactly one creature for one combat at a time. The repeatability is the whole pitch, since the activation can blank an attacker turn after turn or hold a blocker back on the swing-back, but four mana per use means the engine never builds a board, it only stalls one. As interaction it is a placeholder, slow and one-for-zero against anything that goes wide. Its actual job is the narrow one a generic artifact tapper has always done since this kind of card first appeared: keep the single largest threat on the table locked down indefinitely, color-blind and immune to the removal that would answer a creature doing the same work.