The Silver Chair was a magical device constructed by the Queen of Underland (also known as the Lady of the Green Kirtle), designed to keep Prince Rilian bound to a cursed enchantment. Every night, Rilian was sat down on the chair to renew the manipulative magic. It made him susceptible to the witch's lies, and caused him to forget who he truly was. The excuse given for tying him to the chair each time was that every night he would turn into a great serpent, and had to be restrained to keep him from harming anyone. It is unknown how or exactly when the Silver Chair was constructed.