Orcish Captain

A coin flip stands between this Orc and the pump it wants: win and the target swells, lose and it shrinks. The activated ability splits a clean buff down the middle, so half the time you push damage through and half the time you sabotage the creature you were trying to help. The downside is not a fizzle but an actively hostile result (-0/-2 where you wanted +2/+0), and that hostile failure case is the balancing lever. A reliable repeatable pump at one mana per activation would be too strong on a one-drop in this color, so the design taxes consistency to license repeatability: you can keep flipping, accepting that the math burns you as often as it rewards you. Flavor and mechanics agree completely, framing orcs as undisciplined brawlers who bungle the charge about as readily as they win it. The narrow targeting (Orc creatures only, including itself) keeps the effect self-contained, a tribal payoff for a tribe that was never supported well enough to actually pay off. What it preserves is an early instinct Wizards has mostly walked away from since: bolting genuine randomness onto a permanent and treating the unpredictability itself as the cost, rather than a flaw to be smoothed out of the design.