Uther becomes obsessed with Igraine, the wife of Gorlois, Lord of Cornwall. Merlin tricks Uther out of the sword and plunges it into the Rock of Ages, who promises to keep it until a good man can withdraw it. Uther's mind is plagued by madness and lust, and Britain slides back into civil war. Merlin strikes a deal with Uther to let him bed Igraine in exchange for guardianship of the son born from the union, and for Gorlois and his men to be spared. Merlin transforms Uther's appearance into that of Gorlois, fooling everyone in Tintagel Castle except for Igraine's young daughter, Morgan le Fay. Uther later has Gorlois and his men slaughtered, deliberately going-back on his word to Merlin.