Prahv, Spires of Order

One of ten guildhall lands that tied each guild's flavor to a mana-producing land, and the Azorius entry buys the most defensive ability in the cycle: a six-mana fog that names a single source rather than the whole turn's combat. That narrowing reads like a downgrade but plays like a scalpel. A blanket fog stops the alpha strike; this prevents every point a chosen source would deal, which means it can blank a single enormous attacker, a burn finisher pointed at your face, or a one-shot combo damage source while leaving the rest of the board to resolve on its own terms. The land enters untapped and makes colorless mana with no strings, so the cost of holding the ability open is just inclusion, not a dead card in the early game. Sinking six mana into a damage-prevention shield is a slow plan in any fair matchup, which is why it never asked to anchor a manabase: it is insurance, a colorless source that quietly becomes a repeatable protection spell once you have lands to spare. Giving a utility land a guild-flavored ability strong enough to matter without warping the early curve means pushing the entire bill to the back of the game, where preventing a single decisive point of damage is most likely to swing a result.