Mandible Justiciar

A payoff that rewards a deck for doing what it was already going to do. Artifact aggro tends to flood the board with cheap permanents; the trick is turning that quantity into pressure rather than clutter. This creature does it by scaling with every artifact that follows it, and because the trigger keys off the artifact entering (not a spell cast), it counts tokens, recurred permanents, and things that flicker in, not just hardcast pieces. Pair the growth with lifelink and each swing does double duty: the same +1/+1 that closes the game also refills the life total that aggressive mirrors and burn are trying to drain. The body is where the honest price sits. A 2/1 folds to a single removal spell, and the buffs are transient (until end of turn), so the card wants to be attacking, not sitting back accumulating value across turns. Its ceiling is entirely a function of how densely you can pack cheap artifacts; its floor is a stranded beater the moment you cannot. The design belongs to a long line of "each of these you play makes the last one bigger" white and artifact aggressors, where the reward is deliberately front-loaded onto the turn you commit to the board rather than banked across many.