Strongarm Monk

Spellslinger payoffs usually live on small, fragile bodies that turn every cantrip into a sliver of damage; this one inverts the math by attaching the trigger to a 3/3 and then handing the pump to the entire board rather than to itself. The reward is wide, not tall: cast one noncreature spell and your whole team swings a step bigger, which makes the Monk a far better fit for a go-wide white shell than for the lone-prowess-creature line it superficially resembles. The friction is the five-mana cost, steep enough that by the time it lands you are usually casting your spells with a board already assembled, so the +1/+1 is meant to break a stalled combat rather than to grind incremental value over many turns. It is a one-sided overrun that fires once per noncreature spell and stacks within a turn, which rewards a hand of cheap instants held for a single explosive attack step. White rarely gets this kind of repeatable team-wide pump tied to spellcasting, since prowess and its cousins almost always confine the bonus to the creature that carries the keyword; routing the effect outward, to creatures you control, is the design wrinkle that makes the Monk a different animal from the prowess line it borrows its trigger from.