Planewide Disaster

A Wrath of God nobody casts. The Phenomenon slot was designed to be the game's involuntary event: not a spell you choose, not a permanent you pay for, but a card the planar deck flips face-up and resolves before handing control back to the plane you were headed toward. This one lands the board wipe on whichever player's turn happened to trigger it, with no regard for who was ahead, who built the widest, or who would have wanted it. That randomized ownership is the entire design premise. A sweeper's strategic weight normally lives in the decision of when to fire it; strip the decision out and you get an effect that punishes the player most committed to the battlefield, whoever that is when the roll comes up. It shares its destroy-all-creatures line with a long tradition of white mass removal, but it belongs to none of those decks and answers to none of those players: it is an environmental hazard, closer in spirit to a trap sprung by the table than to a card anyone sideboards for. The upshot is a sweeper whose timing is authored by the format itself rather than by a pilot, which is exactly the kind of shared-chaos texture the multiplayer variant was built to generate.