Three Blind Mice

Most Sagas advance a story across their chapters; this one hands you a copy effect on a timer. Chapter I seeds a lone 1/1 white Mouse, then chapters II and III each make a single copy of a token you already control. Point them at the Mouse and you count up to three; point them at something bigger and the nursery-rhyme framing evaporates, because nothing restricts the target to a mouse. That is the design's real hook: white go-wide strategies have long wanted a cheap, repeatable token-copy effect without leaning on artifacts or blue's clone package, and the Saga supplies exactly that, one copy per turn, metered across two draw steps so it can't be front-loaded. Because copies take only a token's copiable values, what you duplicate is the token's printed base: a Golem token stays a 3/3 colorless artifact, an Angel with lifelink keeps that lifelink, but any Auras, Equipment, or +1/+1 counters riding on the original stay behind. The card scales with which token has the better printed profile, not with whichever creature you've dressed up. The fourth chapter is the collection notice: an anthem plus vigilance timed to arrive the same turn the Saga sacrifices itself, converting a slowly widening board into an attack that can also hold the fort. The restraint is entirely in the pacing. One copy at a time, no way to rush the counters, so the ceiling is high only if you have already built the board worth copying.