Emmara, Soul of the Accord
The trigger word is "tapped," not "attacks," and that single substitution is the whole engine. Most token-on-combat creatures pay you for swinging into a board, which means the payoff arrives exactly when it is least safe to commit. Emmara unhooks the reward from the attack step entirely: any tap will do. Convoke a spell, crew a vehicle, pay an activation cost, swing into open air, and a 1/1 lifelink Soldier falls out the back. She does nothing standing still, so the design forces a specific question every turn: what can I tap her for that I was going to do anyway? That answer is where the card lives, because the Soldiers compound. Each one is a lifelink blocker, a convoke body to tap for the next spell, and another warm creature for any board-wide pump. What makes the tap clause quietly generous is that it doesn't care who tapped her or why, so anything that taps a creature for value (mana, vote, crew, convoke) becomes a token generator the moment she's in play. The friction is throughput, not fragility: she only pays out once per tap and has to untap to do it again, which rewards permanent-based tap outlets over one-shot combat. The deckbuilding pull is toward effects that tap things for reasons unrelated to attacking, a narrower and stranger design space than "go wide" suggests at first.
