Merlyn has finally tipped into full-blown madness: He's sent his Furies on a campaign across the realm to burn everything in sight, and only those who swear fealty to the mad king will be spared. But there is still hope! A bargain between a powerful new ally and the Knights of X may just secure the Siege Perilous and the future of Avalon. Elsewhere, Saturnyne forges an alliance with a former enemy. But trust is a fickle thing. Will these new allegiances bring triumph or ruin for the mutants of Otherworld?