The Tabernacle at Pendrell Vale

Rent. That is the design, stated as a continuous tax on creatures-in-play that scales with the boardstate rather than the spell that produced it. Most hate cards punish a specific verb: casting, attacking, searching. This one punishes existence, and it bills the controller, not the caster, which inverts the usual incentive structure of a stax piece. A token swarm pays per token. A go-wide elf deck pays per elf. The controller, having presumably built around the asymmetry (a small creature footprint, mana to absorb the upkeep, perhaps lands animated only when the alpha strike is worth the toll), pays a little and watches opponents drown in cumulative ones. The recurring-upkeep-tax design language has been revisited often since (Smokestack, Tangle Wire, Sphere of Resistance pulling at the spell side), but the per-creature, per-upkeep meter is unique in how directly it converts an opponent's mana investment into ongoing maintenance cost. The Reserved List status and a single printing have done the rest: the card is functionally unprintable at this point, both because the design is too punishing for modern creature-centric environments and because Wizards has committed to not reprinting it. What was once a Legends rare with thin distribution became, by sheer accumulation of years, among the most expensive functional cards in the game, and the conversation around it now lives somewhere between design history and collector mythology.