Undead Butler

Two engines packed into a body that costs almost nothing to run. The enter trigger fills the graveyard by three; the death trigger reaches back into that same graveyard, exiles the Butler to return a creature card, and hands you back something worth having. What makes the loop coherent is that both halves feed the same resource: the self-mill stocks the yard the recursion draws from, so the card is its own setup. The exile clause on the death trigger is the discipline: this is not an infinitely recurring value machine, because the Butler removes itself to pay for the return, and returning a creature card excludes it from bringing itself back. It gives once, and gives on your schedule, since a dead Butler is more useful than a living one. Design like this leans on graveyard-as-toolbox thinking rather than raw stats, the same axis that carries aristocrats and reanimator shells: a cheap creature that trades combat presence for the promise of two triggers and a card advantage swing across its lifecycle. The single restriction that keeps it fair is that the recursion targets creatures only, so it cannot reload your best noncreature bomb; it exists to keep a threat coming back, not to grind everything back.