Go-Shintai of Lost Wisdom

Every Shrine scales its payoff with the size of the nest, but where the red one throws damage and the green one makes mana, blue's aims its scaling at the library. The end-step trigger converts your Shrine count into a mill number, which means a wide board becomes a repeatable, slow clock: not a game-ender on turn four, but a total that compounds while the tribe grows. The 0/4 flying body tells you the plan. This is not a creature that races; it is a wall that survives, four toughness in the air blunting early aggression and keeping the enchantment on the table long enough for the count to matter. That patience is the whole ambition of a Shrine deck: assemble many, hold them, let the numbers stack. The optional each end step imposes a small tax on the engine, a cost you choose to pay to prod the trigger rather than a free tick every turn. And because you pick the target, the effect points either way: at yourself to feed a graveyard plan, or at an opponent to grind them toward an empty library. Blue's contribution to the color-cycle, then, is inevitability of a particular shape, a defensive perch that turns cumulative tribe size into a mill total aimed wherever the board wants it.