Summon: Choco/Mog

The Saga-as-creature framing has a built-in problem: a card that reads its own timer usually just sits there, ticking down to its own destruction while it does one thing per turn. This one puts the countdown to work by pairing it with a body that actually attacks and a chapter ability that fires the same effect four times. The first chapter resolves as the Saga enters and the rest after your draw step, each giving your other creatures +1/+0 until end of turn: four turns, four identical Stampedes, landing early enough that the buff is up when you swing. That "until end of turn" clause is carrying more weight than it looks. Each Stampede is a discrete, single-turn burst rather than a stacking anthem, so the card never builds an ever-larger board over its four chapters; it rents the same modest push four times, and the bonus resets to nothing between turns. The sacrifice after IV is what keeps this from becoming a permanent tax on the opponent: the source removes itself once the four pushes are spent, leaving no maintenance and no lingering liability. The arithmetic is the strategic hook. +1/+0 across an empty board is nothing; across a crowded one it is often lethal, which anchors the card to boards that already go wide and want a disposable finisher rather than a standing anthem. The design does exactly four things, and the fourth is leave.