Netherese Puzzle-Ward

The two abilities are built to feed each other, and the coupling is the whole idea. Focus Beam scrys anywhere from one to four every upkeep, so the floor is a slow trickle of selection and the ceiling is a full-hand dig; Perfect Illumination cashes that same roll into a real card, but only when the d4 lands on four, a flat 25% each turn. What you get is a scry engine that occasionally converts its own best roll into raw card advantage, with no mana investment past resolving it once. It leans on the dice-matters subtheme that rewards any effect widening a die's range or granting rerolls, since nudging the d4 toward its maximum improves both halves at once: deeper scry and a live draw trigger. Left to run unaided, it behaves as a patient value permanent, closer to a repeatable filtering enchantment than a payoff, which suits decks that treat variance as an engine rather than a liability.