Boneyard Aberration

Conjure is a mechanic that only exists in a digital client, and this is one of its purest black expressions: a creature whose death fabricates fresh cards into your graveyard that were never in your deck. The body is unremarkable, but the death trigger converts a single dying Skeleton Dog into a self-refilling aristocrats engine, since each conjured Reassembling Skeleton can climb back out of the yard for one generic and one black mana and die again. The result is a card that manufactures its own sacrifice fodder from nothing, sidestepping the usual deckbuilding cost of packing recursive bodies. The exile clause on its own death is the pivot: it removes the Aberration from the loop permanently in exchange for three replacement threats, so the card cashes itself in rather than recurring. What it opens up is a graveyard that grows independent of your library, a design idea that only became possible once cards could exist outside the sixty you registered. Built for grindy black sacrifice shells that want a steady supply of expendable creatures, it fills the fodder slot without asking you to draw the fodder.