Selective Obliteration

Every player reads a different sentence off the same board wipe. Each player names a color (in turn order, out in the open, so later choosers can react to what the caster and earlier players have committed to), and keeps colorless permanents and permanents of exactly that one color. The spell that spares your monocolor board strips the multicolor pile across the table. Multicolored permanents get exiled no matter what color their controller chooses, and exile is the operative word: a Golgari value engine, a five-color goodstuff pile, a two-color commander all vanish without a death trigger and without regard to indestructible, because "only the color its controller chose" is a strict single-color test that gold cards can never satisfy. Colorless permanents survive unconditionally, quietly handing the edge to whoever committed to artifacts, utility lands, and Eldrazi. The sorcery speed and the five mana are the tax on that asymmetry: this is a board you build toward, waiting for the turn your own permanents are pure enough that the sweep costs you least. It belongs to the lineage of wraths that let the caster carve out survivors (the way Cataclysmic Gearhulk spares by type), except the survivor set here is decided one player at a time, publicly, and exile rather than destruction is what makes the removal so total. The question is never whether to blow up the board; it is which color axis leaves you standing and everyone else stripped.