Piercing Rays

The condition is the whole trick: a two-mana exile that only answers something already tapped. That looks like a downgrade until you notice the card carries its own setup. The Forecast half taps a creature down during your upkeep, so the same card that punishes a tapped attacker or blocker can also manufacture the tapped state it needs. The catch is that both halves have to fire on the same turn: reveal to tap during your upkeep, then cast the sorcery in your main phase, because the creature untaps on the opponent's turn and the window closes. That timing constraint keeps the combo honest, forcing you to commit the whole plan inside one of your own turns rather than banking a lock across the table. Exile matters here too, since dodging death triggers and recursion is exactly what a slower, controlling white deck wants against the creatures it can afford to wait on. Forecast has always been a fringe mechanic, a way to give a hand card relevance without ever spending it, and this is one of the cleaner arguments for it: the reveal cost is steep enough that you use it to pace out a game rather than tempo an opponent, and the payoff (permanent removal at a discount, on a creature you chose to stop) rewards the patience. It is removal built for the deck that plans to still be playing on turn ten, not the one racing to close by turn five.