Blood Fountain

Two graveyard functions that most decks would buy separately are stacked into a single black artifact for one mana. The enter trigger hands you a Blood token, a self-contained rummaging outlet that pitches a stranded card and refills whenever the mana and a spare card in hand allow it. The artifact then lingers as a delayed engine: sacrifice it later and up to two creature cards come back from the yard to your hand. The two halves run on opposite clocks. The token is cheap and immediate, the loot-and-discard cost that aristocrat and reanimator shells want on the board anyway (a sacrificial permanent plus a way to bin fatties or fill the yard). The recursion is expensive and patient, a mana sink you cash out once the fodder justifies it. That deliberate asymmetry is the point: the front end is discount filtering, the back end a two-for-one Raise Dead that returns creatures to hand rather than to the battlefield, and nothing forces you to spend them together. Note the distinction that keeps it honest: this recurs, it does not reanimate, so it feeds a graveyard plan without ever shortcutting the mana you owe to recast what you got back. Cheap black enablers that mine the yard for resources are common enough; the density here is what stands out, one shell packing filtering and creature recursion whose value comes from discarding and returning rather than from any self-milling.