Schismotivate

Eight points of effective power swing across a single combat step, split into two clauses and pointed wherever you like: +4/+0 onto one creature, -4/-0 off another, all for one card at instant speed. Both halves move power and nothing but power, which is the read that frames everything the spell can and cannot do. Aim both at one combat and you get a tilted one-for-one: your pumped attacker caves in a shrunk blocker that no longer hits back hard enough to kill it. That last point is the ceiling on the shrink half. Stripping power does not stop a creature from blocking, and it does not stop it from absorbing damage on its unchanged toughness; it only stops the creature from dealing enough back to destroy the attacker it stops. You have declawed the blocker's offense without removing it from the fight. The split targeting is where it gets stranger: the two creatures need not be fighting each other or even in the same combat, so you can swell one attacker while gutting a blocker standing in front of a different one. The narrowness is structural. Point both halves at your own side and the penalty just sits there as dead weight, and because every effect ends as the turn does, none of it reaches across to disarm an opponent's next swing. All the reach lives in the buffed attacker and the lane it opens, which is why it reads as a finisher's trick rather than a value engine: it earns its slot the turn you are forcing the last points through, not the turn you are grinding.