Silver Chair

The Silver Chair was a magical device constructed by the Queen of Underland to keep Prince Rilian bound to a cursed enchantment. Every night, Rilian was sat down on the chair to renew the manipulative magic. The excuse for getting him on the chair was that he was turned into a Great Serpent and had to be tied to the chair to restrain him.

When (after apparently 31 years of slavery in this way) Rilian was cut loose one night by Eustace Scrubb, Jill Pole, and the Marsh-wiggle Puddleglum, he instantly grabbed his sword, swerved around, and sliced the chair into pieces, breaking the spell for good.