Virulent Silencer

Poison has always lived in one of two places: the creatures that carry it themselves, and the anthems that hand it out to others. This is squarely the second kind, but tuned to a single quality of your board rather than a keyword. Infect and toxic put the counter-generation on the attacker; here the payoff sits elsewhere, and it fires as a triggered ability: whenever a nontoken artifact creature you control connects, that trigger goes on the stack and the defending player takes two poison counters. Your robots and constructs do not need to be built to poison; they simply need to land a hit, and at two counters apiece the ten-counter kill sits within a small handful of unblocked swings. The nontoken clause is the balancing lever: it shuts the door on flooding the board with cheap tokens and forces you to field real, castable artifact bodies, each representing an actual mana investment. As a 2/3 it is not the threat itself; it is the enabler that turns an ordinary artifact aggro board into a second, faster loss clause running alongside the life total. The lineage is the payoff-lord template applied to an alternate win condition: an effect that changes what combat damage means for a specific set of creatures, without ever asking those creatures to change what they are. It wants company, and it rewards a board already built to attack.