Serra's Sanctum

Tolarian Academy got the ban hammer and the headlines, but the land cycle that scaled with permanent type had a quieter white sibling the color did not know what to do with for years. The math is brutal in the right shell: every enchantment you control adds a white mana, so a board of cheap auras and enchantments turns a single tap into a surge that funds a turn you should not be allowed to have. What separates this from its degenerate cousin is the type it cares about. Tolarian Academy paid off artifacts (the densest, cheapest permanent type of its era, which is why it was banned), while this asks for a class of permanent that historically fought for its keep and could never be deployed at the same density or speed. That gap is why one land defined a combo era and the other waited decades for enchantment-matters payoffs to give it a board worth tapping. Structurally it poses the same question Gaea's Cradle asked in green and Cabal Coffers later asked in black: how much mana can one land make if you commit your whole board to a single axis. The answer here is "as many white as you have enchantments," a payoff perpetually hunting for the critical mass it cannot generate on its own.