Suki, Kyoshi Warrior

A go-wide payoff that seeds its own math. Most creatures whose power counts your board rely on other cards to fill it: this one builds toward its own number. Each attack manufactures a fresh Ally token already tapped and swinging, and because the power counts creatures continuously, that new token folds into the total before damage resolves. Declare an attack with a five-creature board and the trigger adds a sixth: her power ticks up to six, so she connects for six, not five, in the same combat step that created the token. That self-feeding loop is the whole appeal, and it comes with no summoning-sickness tax and no separate haste enabler, since the token enters already attacking. The fixed toughness of 4 is the counterweight. An engine that both counts and grows the board could snowball out of reach, so the frame stays killable enough that a single well-timed removal spell caps it before it compounds. That tension (an explosive, ever-updating power stat bolted to a modest body) pulls the card back from a pure ramp-and-swarm idea; the hybrid cost lets either half of Selesnya field it, and the Ally subtype points it toward the wide, token-heavy builds where the attack trigger has the most room to run.