Oath of Scholars
The catch-up mechanic, drawn as an enchantment that flows in only one direction. Every upkeep, the active player must aim it at an opponent holding more cards than they are, then decides whether to dump their hand for three fresh ones. The design conceit is that the engine only ever runs downhill: you cannot refuel when you are the one sitting on a stockpile, because the targeting clause demands an opponent who is strictly ahead of you in hand size. That makes it a rubber-band effect rather than a raw card-advantage spell, a balance lever the Exodus cycle of Oaths leaned on across all five colors. The friction worth noting is the discard-then-draw structure: refusing is always legal, so the card never forces anyone to empty a strong hand, and the three-card payoff is fixed rather than scaling with how far behind you have fallen. It rewards getting low cheaply, hellbent or near it, then converting that deficit into a clean restock. As a symmetric enchantment that sits on the board demanding decisions every turn cycle from whoever is losing the card war, it reads less like a draw spell and more like a public utility: a refill station anyone can use, but only after they have qualified by falling behind.
