Retrieving the Cannon
Later in the game, Shad discovers an Owl Statue blocking a doorway in Renado's basement in Kakariko Village. When Link obtains the Dominion Rod he can, with the help of Shad, move the Owl Statue blocking the entrance. This reveals the broken sky cannon what Zant broke into, which Midna can warp to Lake Hylia once Shad is out of the way.
There, if Link shows Fyer the cannon, he will repair it after recognizing it as an old artifact. Once the cannon is back in its original state, Link can grab hold of the back of the cannon with his Clawshot, which then launches him all the way to the City in the Sky.