Cataclysm

A symmetrical mass sacrifice with a twist that makes it asymmetrical in practice: instead of wiping the board to zero, it leaves everyone with up to one artifact, creature, enchantment, and land and forces the rest into the graveyard. The design lever is that final clause. Because every player keeps at most one artifact, one creature, one enchantment, and one land, the card punishes board development rather than presence; the player who overcommitted loses the most, the player who held back loses the least. That makes it a Balance for the permanent-rich era rather than a true reset. The "keep one land" line is the cruel part: a player tapped out across five or six lands suddenly has one, and casting anything afterward becomes a project. White has always owned the catch-up sweeper, the spell that punishes the player ahead by flattening resources back toward parity, and this is the maximalist version of that idea, hitting all four permanent types at once where Armageddon and Wrath of God each pick a single axis. The cost of that breadth is the symmetry: you sacrifice down too, so the deckbuilder who can rebuild from a single permanent faster than the opponent comes out ahead. Sorcery speed and a four-mana commitment keep it honest; it cannot ambush a developing board, and the resolution leaves the table in a strange, sparse equilibrium that few sweepers ever produce.