Tibalt, Rakish Instigator

Static hatred wearing a Planeswalker's clothes. The five-loyalty body and the Devil engine are almost beside the point: the entire card is built around a passive that shuts off opposing life gain the moment it resolves onto the battlefield, a lock that persists as long as the walker survives and does not care whether you ever activate it. That inversion is the design idea. Most Planeswalkers pay for their static effects with loyalty spent over turns; here the standing rule is free, and the loyalty is spare change you feed into a stream of one-power Devils that ping something for a point when they die. The anti-lifegain clause is the reason the card exists, aimed squarely at the fog-and-stabilize archetypes that beat aggressive red by climbing back out of burn range. Once it hits play, those decks either race to kill the walker or accept that their soul-warden triggers and lifelink blockers have gone inert. The Devil tokens are the fair face of a fundamentally unfair card: they protect the loyalty, chip in reach, and turn a piece of removal into a small burn spell, but they are secondary to the taxing effect that punishes an opponent for the sin of trying to survive.