Avian Changeling

Every tribal deck wants a body that counts toward the tribe without locking the build to one creature type, and a 2/2 flyer that is simultaneously every creature type does exactly that job at a price the tribe can absorb. Changeling was a clean solution to a structural problem: when an entire set's mechanics key off Goblin, Elf, Faerie, Merfolk, and a dozen others at once, you want generically useful cards that slot into all of those decks without forcing a designer to print one copy per tribe. The flying matters more than the keyword soup suggests. Among the cheap changelings, an evasive one fills a different role than a ground-bound vanilla 2/2: it pressures planeswalkers and life totals while still ticking every "other Goblins you control" or "Elf creatures get +1/+1" anthem in the deck. The shapeshifting is what gives it reach across archetypes; the flying is what gives it a reason to be the changeling you actually run. It asks nothing of you in deckbuilding beyond a willingness to play white, and pays back a creature that is, depending on the table, a Soldier for one effect and a Spirit for another in the same combat.