Freyalise's Radiance

A green enchantment built to hate out a single mechanic, which is a strange posture for the color and an even stranger one for a permanent that taxes its own controller to stay alive. The static line freezes the untap step of snow permanents, so snow lands stop producing mana and the creatures and artifacts built on top of them stop producing value. The cumulative upkeep is what keeps that from becoming a lock: each turn it demands another increment, so the clock runs against the controller as fast as it runs against the opposing engine. That self-imposed tax is the design's honesty. This is not a forever-answer but a tempo window, a few turns during which the opponent's mana and threats sit iced over while you press an advantage and let the enchantment fall away on its own. It is a pure silver bullet, not a card you construct a deck around: it asks nothing of you except a metagame full of snow, and outside that metagame it does nothing whatsoever. The interest is in how narrowly it commits. It answers a parasitic axis with an equally parasitic card, and it belongs to an era when the design team would print direct, surgical counters to their own mechanics and trust the format to supply the targets, rather than leaving the answer to colorless generic removal.