Summon: Good King Mog XII
Most Sagas resolve their story and vanish; this one enters as a 4/4 flyer with lifelink, spends three turns building a board, and then sacrifices itself on schedule like every other Saga. The reminder text is explicit about the exit ("Sacrifice after IV"), and being a creature does not spare a Saga from that final beat, so the sequencing worth reading closely is what happens before the curtain falls, not after. Chapter I supplies two lifelink Moogle tokens. The middle chapters attach a copy trigger to noncreature spells, letting each cast duplicate any non-Saga token you already control, which is where the engine earns its keep: the more your deck spreads cheap noncreature spells across turns, the more the two Moogles multiply into whatever your other tokens are worth. Chapter IV then hands two +1/+1 counters to each other Moogle you control, an anthem that rewards you for arriving at the last chapter with an army already assembled rather than a single body. The counters landing only on other Moogles is the restraint that stops it from snowballing off one token, and it means the card's payoff is front-loaded into the go-wide plan, not the flyer itself. The whole thing is a compressed recruit-replicate-anthem sequence that trades its own body for the board it leaves behind, which is the opposite of how most token-generating creatures pay you.

