In The Amber Spyglass Lord Roke followed Mrs. Coulter to the Church and assisted her in trying to save Lyra from the bomb that the Church was trying to use to kill Lyra. He killed Dr. Cooper, the scientist who had been at Bolvangar with Mrs. Coulter and had almost separated Lyra and Pantalaimon, and a witch who was serving the Church. When attacking the witch, just before the bomb was detonated, Lord Roke was killed. He died when the witch, killed by the last of the poison from his spur after he had thrust it into her neck, fell from the sky where she was flying on her cloud pine branch.