Cataclysmic Gearhulk
The clever line in white's catalog of board sweepers: instead of clearing everything and counting on you to have the wider board afterward, it lets each player keep exactly one permanent of each major type and feeds the rest to the graveyard. That symmetry is the constraint that pays for the power. The card cannot discriminate by which player it hits, so the asymmetry has to come from how you build: keep a board that survives the cut better than your opponent's. A go-wide deck loses everything but a single creature; a control player holding one bomb each of artifact, creature, enchantment, and planeswalker walks away from a sweeper that would have cost most decks four or five cards. It is a Wrath of God for the permanent-type axis rather than the creature axis, and the design has to be cast deliberately rather than as a reflexive reset. The vigilant 4/5 body does quiet double duty: the creature it leaves itself with can attack the next turn while still holding the line, so the sweep and the clock arrive in the same package. White rarely gets to one-side a board this thoroughly, and the permanent-type framing is how the design slips that asymmetry past color-pie restrictions without simply handing the controller a free Plague Wind.
