Hephaestus' Throne

Hephaestus' throne is the throne Hephaestus sits on in the Hall of the Gods. It is a mechanical chair that has a defense system which Percy triggered while fighting Kronos in The Last Olympian. It shot tendrils of electricity in all directions. It is belived that it is some what similar in design to the Hephaestus cabin at Camp Half-Blood.