Zealous Persecution

The instant-speed double-sided pump is one of the oldest tricks in white aggro, but bolting a black half onto the swing changes the arithmetic entirely. A one-sided anthem just makes your creatures bigger; this opens the gap from both ends in a single cast, your board climbing two points relative to theirs on every creature involved. The two halves point the same direction even as their signs differ: your +1/+1 and their -1/-1 are not mirror images but a coordinated squeeze. That asymmetry is what makes it lethal as a combat trick rather than a tempo nudge. A trade you were going to lose becomes one you win; a race you were behind in flips; a board stall collapses on the defending side. The -1/-1 clause is the half that earns its keep even when you have nothing to pump, doubling as a quiet sweeper against any deck built on one-toughness bodies: it clears a swarm of tokens or mana dorks, or shrinks an incoming attacker to nothing, regardless of whether you control a creature at all. Cast in response to attackers or blockers, it retroactively turns the opponent's combat decision into a misstep, since the math they committed to no longer holds. The spell rewards you most when you are already ahead and want a single card to bury the opponent under that lead, but its subtractive side keeps it live as pure removal in a pinch. It sits in the lineage of board-swinging instants that close games rather than stabilize them.