Haru-Onna
The replay engine for a deck that wanted to keep its enters-the-battlefield triggers in motion. Bounce-to-hand creatures usually pay for their reusable value with a clause you have to engineer around: a sacrifice outlet, a separate bounce spell, a tempo loss to recast. This one builds the recursion into the deck's natural cadence instead. If you are already casting Spirit and Arcane spells (and a Spirits deck of this era was doing little else), the return-to-hand fires for free as a rider on spells you wanted to cast anyway, turning each one into a small card-advantage loop: cast a Spirit, send this back, replay it, draw again. The 2/1 body is almost beside the point; it is a delivery vehicle for a cantrip you can fire repeatedly without ever holding a dedicated enabler. Every loop creature faces the same problem, which is how to make the bounce cost nothing extra, and the answer here is to tie it to a trigger the deck generates on its own. Outside that shell the second ability does nothing, and the card collapses back into an overpriced cantrip on legs. Inside it, the recursion is as close to friction-free as the mechanic gets.

