Ruinous Ultimatum

The three-color cost is the point, not the drawback. A one-sided board wipe has existed for years in various shapes, but pricing it at seven mana of Mardu pips (a rigid two-two-three split across three colors) forces the card into decks committed enough to those colors that a seven-mana sorcery is a plausible turn. What you buy with that commitment is the cleanest asymmetry a wrath can offer: your creatures, your Planeswalkers, your enchantments all stay, while everything nonland your opponents built comes off the table at once. That gap between "destroy everything" and "destroy everything of theirs" is enormous, because a symmetrical sweeper trades your development for theirs, while this one converts a full board into a one-turn checkmate. The sorcery timing is the honest tax: no ambush, no end-step surprise, so opponents see the mana and know the threat is live. Against a deck that overcommits, casting this reads less like removal and more like conceding on their behalf. It answers the design question of what a control finisher looks like when the finisher and the sweeper are the same card: resolve it with a board of your own, and there is rarely a follow-up worth waiting for.