Disruptor Pistol

Six total mana across turns for one creature is far too slow for Modern; its colorless artifact body does not offset the tempo loss.

Could be wrong if An unshown artifact-sacrifice shell could value a tutorable removal artifact more than normal decks do.

Legacy demands much cheaper or more disruptive interaction; delayed four-mana activation removal has no credible competitive role.

Could be wrong if A niche artifact engine could make the sacrifice clause relevant, but no such support is supplied.

Grixis Affinity can value the artifact count, but four mana to cash in for 5 damage is markedly behind Pauper's efficient removal.

Could be wrong if If 5-toughness creatures and artifact synergies become unusually important, it could earn a narrow slot.

It is colorless removal with a sacrifice trigger, but four mana for only 5 damage is too inefficient against typical multiplayer boards.

Could be wrong if Dense artifact recursion or sacrifice payoffs could make its low-cost artifact body more valuable than its removal rate.

Cast early, it can later kill most creatures at instant speed; the delayed four-mana activation keeps it solid rather than premium removal.

Could be wrong if Unknown speed, artifact removal, and creature toughness distribution could make the activation too slow or unusually effective.