Defiler of Faith

The design bargain here is unusually generous for white: pay two life, cast your permanents for one less white mana, and the discount compounds because every white permanent spell you cast leaves a Soldier behind. The token trigger keys off casting, not resolution, which is a real distinction: the 1/1 arrives even if the spell it rode in on gets countered, so an opponent who answers your engine pieces still concedes bodies to the board. This is a mono-color take on the cost-reduction-plus-token engine that has usually lived in the ramp shells of green and the ritual economy of black. White gets to convert its own permanents into a snowball, and the life payment does subtle balancing work: it is optional, so the card is never a dead cost against you, but the games where it matters most are the ones where you can least afford to bleed out. The reduction touching only white mana in a spell's cost is the other quiet restraint, keeping the acceleration pointed at white spells specifically rather than the whole curve.

The 5/5 vigilance body is the part people underrate. This is not a fragile enchantment sitting back building value; it attacks and defends the same turn while the engine runs, threatening to close a game on its own tempo before the Soldiers add up. Each half covers the other's weakness: the token stream keeps you ahead on the board if the beater is answered, and the beater keeps you from being ground out while you develop. That welding of aggression and grind into one five-drop is what separates it from the usual white value-piece.