Sealing Spike

The Sealing Spike is a sacred lock, with the purpose of mantaining the seal on the The Imprisoned in Skyward Sword. It is located in the Sealed Grounds. It is assumed to be destroyed, along with Demise in the present when Link's wish for the destruction of the Demon King is granted. The wish causes the Isle of the Goddess, which holds the Statue of the Goddess and the Sky Keep to land in the large spiral pit in the Sealed Grounds, destroying Demise/The Imprisoned.

Usage
The Sealing Spike was constructed by Hylia, to serve as a lock on Demise/The Imprisoned. At the same time the Temple of Hylia, or the Sealed Temple was built in order for its sole inhabitant, Impa, to keep watch over the Sealing Spike, making sure that the seal on the Demon King wasn't weakening. In order to keep the seal intact, Hylia as her reborn form of Zelda a mortal living in Skyloft puts herself into a suspended animation.

The Sealing Spike not only serves as the seal on Demise, but also as The Imprisoned's vulnerable point when it breaks free from its prison multiple times in the game. The Sealing Spike, which is thrusted into the monster's head can only be accessed if Link manages to knock the creature over, by destorying all eight of its toes. However, Link can also land on The Imprisoned's head by skydiving on top of it and also by hitting it with a bomb from the Groosenator. Upon gaining access to the Sealing Spike, Link can release a barrage of sword strikes on it. After The Imprisoned is defeated, Link must use a Skyward Strike on the Sealing Spike to restore the seal on Demise.