Ensnared by the Mara

The villainous-choice template usually offers a bad-versus-worse split, but this one is lopsided in an unusual way: both branches punish, and which is worse depends entirely on what sits atop the chooser's library. Grant the free spell and they risk handing you their best buried nonland card at no cost; refuse it, and they eat direct damage scaled to the mana value of their own top four cards, a burn effect whose ceiling is set by their deck's average cost rather than yours. The design turns an opponent's deckbuilding against them in both directions. A control deck stuffed with expensive spells fears the damage half, since those high mana values convert straight into a heavy burn total; a deck of cheap threats can shrug the burn off but keeps the free-cast branch mostly harmless, because whatever the exile turns up is low-impact by definition. The sharp part is that the opponent, the one facing the choice, has to weigh the two branches against their own list, so the correct answer is theirs to find and yours to punish. The steep price is the honest part of the deal: at four mana, sorcery speed, and double-red, this wants a dedicated haymaker slot rather than incidental value, and the free-cast line is a gamble on what the exile reveals rather than a reliable engine. It rewards knowing an opponent's list better than they read yours.