Mirri, Weatherlight Duelist

Both halves of this card are combat-math manipulation, and they pull in opposite directions depending on whose turn it is. On offense, forcing each opponent to commit at most one blocker turns a modest 3/2 first striker into a reliable source of chip damage: gang-blocking is off the table, so the defender must find a single creature that can profitably block or else take three. On defense, the tapped clause inverts the usual vulnerability of an attacker. Most creatures that swing leave you exposed the following turn; here, staying tapped after combat throttles the crackback to a single attacker, letting Mirri play traffic cop while she is spent. That second ability rewards a build that keeps her tapped on purpose rather than one that races to untap. The design lineage is the old white-green "duelist" idea of enforcing one-on-one combat, the same restriction that cards like Silklash Spider or various fog-adjacent effects approach from other angles, but Mirri encodes it as a persistent rule rather than a one-shot spell. The friction is the fragile body: a 3/2 that wants to attack into open mana and stay tapped is asking to be picked off by any removal or a well-timed burn spell, and first strike only saves her from smaller blockers, not from the tuck or the exile. She is a Cat Warrior built to referee combat, not to win it outright.