Volrath's Stronghold

A recursion engine that asks nothing of your deck except a black source and a creature in the bin, and it never runs out. The genius of the design is the placement: the creature goes on top of your library, not into your hand, which throttles the recursion to one card per turn cycle and forces you to spend a draw step retrieving it. That single restriction is what keeps an untapped, repeatable creature-recur land from being oppressive. It also turns the ability into a soft Brainstorm fixer in a pinch (top-deck a known card, then dig for it), and it stacks beautifully with sacrifice payoffs because the loop is so cheap to maintain that a single fatty becomes an attrition wall the opponent has to answer permanently rather than once. The land typing matters too: this is recursion that does not cost a spell slot, does not die to creature removal, and slips onto the battlefield as part of a manabase rather than a play that telegraphs intent. Black has gathered plenty of one-shot reanimation since, but a colorless-producing legendary land that grinds a graveyard back turn after turn, at instant speed, with only the top-of-library tax to hold it in check, remains a clean and durable piece of design that still rewards black midrange and control shells decades on.