Wingspan Mentor
The non-Human restriction on the enters trigger is the whole design pivot. This is a Wizard whose job is to grant flight to something that isn't a person: a single target beast, dinosaur, or snake gets the flying counter, and it now qualifies for the anthem every turn you can spare the mana. The enters trigger and the activated ability are built to feed each other, because the tap effect rewards a board full of fliers with +1/+1 counters, and each new flying creature you land widens what the pump reaches. The 1/3 body tells you where the value lives: not in combat, but in the loop it enables, which is why the card wants a wide flying board rather than a single evasive threat. It's a counters-matter payoff dressed as an evasion enabler. The activation carries no timing restriction, so the counters can land at instant speed: hold the mana through an opponent's turn and drop a pump mid-combat to blow out a block, or wait to see removal before committing the growth. Left alone across a few turns, it stacks a rising tide of evasive creatures that outscale whatever the opponent left on defense, a specific kind of inevitability that isn't a single haymaker but a board that keeps climbing out of reach.

