Mister Negative

Exchanging life totals is one of the oldest gimmicks in the game, and it has always been a gimmick in search of a payoff: Magus of the Mirror, Soul Conduit, and the Puca's Mischief tricks all played with the idea, and all of them ran into the same problem. You swap when you are low and your opponent is high, and you hope the tempo lands before they claw the totals back. The enters trigger here bolts on the payoff the effect never had. If the exchange costs you life (because you were sitting above your opponent), you draw a card for every point lost, turning what looks like a defensive reset into a self-inflicted refill. That inversion is the design tension worth noticing: the swap punishes you for being ahead on life, and the card rewards exactly that punishment. The lifelink and vigilance body feeds both directions, letting you climb a life total worth trading away while still attacking, and the 5/5 frame means the trigger rides on a creature that closes games without help. It is a rare case of a symmetrical, historically fragile effect being handed an asymmetric reward that turns the downside into the engine.