Mardu Siegebreaker

The blink-your-own-creature template usually pays out in enters-the-battlefield triggers: flicker a value creature, catch the ETB again, hand the body back. This inverts the payoff. The exile clause here doesn't chase a re-entry trigger at all; it feeds the attack ability, which stamps out a tapped attacking copy of the exiled creature every combat, one per opponent. What you exile becomes ammunition for an offensive rather than a value engine on the defensive, and the sacrifice-at-end-step clause means those copies exist only to swing that turn, closing the loophole where a copied creature would otherwise stick around as a free permanent. Deathtouch and haste on the 4/4 body make the front end a threat the turn it lands, but the interesting tension is what you feed it: a large attacker doubles your board presence in the combat step, and against multiple opponents each swing spawns a copy per player, which is where the ceiling lives. Worth noting the limit built into that copy: the tokens are created already attacking, not declared as attackers, so they never trip the exiled creature's own "whenever it attacks" abilities. You get the printed body and static effects, not a fresh chain of combat triggers. The whole package also rides on fragility. The exile caps at one target and returns whatever you hid the instant the Siegebreaker dies, so the payoff depends entirely on keeping a hasty deathtouch body alive through combat.