Weeping Angel

The design is a mechanical translation of the fiction: a statue that only moves when nobody is looking. Every creature spell an opponent commits to the stack switches the angel off until end of turn, and that is the rare drawback that scales with exactly the kind of board a creature-heavy deck wants to develop, doing the work of a balancing restriction without touching the body or the cost. On a quiet stack, this is a 2/2 with first strike, vigilance, and flash that does not kill creatures so much as delete them: combat damage it would deal is prevented, and that creature gets shuffled into its owner's library, no death trigger, no graveyard, no morph or recursion to salvage. That shuffle is the sharpest part of the card, because it dodges every payoff built on creatures dying. The bind it creates is self-inflicted for the opponent: to fight through the angel, they have to keep adding creatures to shut it off, but each one only suppresses it until end of turn, and it never leaves the battlefield. Come untap, it is a creature again with the shuffle-clock intact, and vigilance means it never chooses between the trap and the block. It behaves less like a removal spell and more like a slow-motion snare, live again the moment the board goes still, and punishing the exact tempo a creature deck is built to generate.