Falcon and Redwing
A snowball built out of a fragile body. The 1/2 flying frame invites you to leave it alone, but the trigger is a compounding loop: connect for one, get a Bird and a counter, and now it hits for two. The next swing makes two Birds and grows the creature to a 3/4, the one after that makes three and turns it into a 4/5, and each unblocked hit widens the next one. Note the asymmetry in the trigger: token production scales with combat damage, but the counter is flat, a single +1/+1 no matter how hard the swing lands. So the body climbs one step per attack while the flock grows by one more Bird each time. That split growth is the design's whole shape: the Birds are the accelerating payoff, and the counter is just enough steady reinforcement to keep the attacker connecting. The engine leans entirely on evasion doing its job, which is why flying is load-bearing rather than decoration; a chumped or blocked attacker produces nothing, and the whole thing stalls the moment the damage stops landing. It is a build-around that punishes being ignored: a creature whose threat assessment flips from "safe to leave alone" to "must be answered right now" between one combat step and the next.
