Reign of Chaos
Color hatred used to live in the spells themselves, hard-coded as mechanical enmity rather than left to the sideboard, and few cards make that philosophy as literal as this one. The four-mana sorcery offers two modes, each demanding a matched pair: destroy a Plains and a white creature, or destroy an Island and a blue creature. That paired requirement is what prices the effect. You get a clean two-for-one, but only against an opponent whose manabase and threats line up exactly with one of the two modes, and only if both targets are actually on the table when you cast it. That rigidity is what dates it. It was built for a world where mono-white or mono-blue strategies were predictable enough that both halves would reliably connect, and where two-for-one removal was scarce enough to justify the constraint. Red's later removal abandoned the template; the genre of land-destruction-stapled-to-creature-kill did not survive the move toward flexible, target-agnostic burn. What rewards attention is how directly it encodes the old color pie's grudges: red as the element that unmakes the orderly (white) and the controlling (blue), expressed not as a flavor line but as a binding clause on the targets. The design captures a balancing instinct that priced removal by how narrowly it could be aimed, then handed you a discount for accepting the narrowness.
