Stone of Trials

The Stone of Trials is an item from Skyward Sword which gives Link access Sky Keep. Link is rewarded with the stone after completing the fourth and final Silent Realm, the Goddess's Silent Realm located in Skyloft, or all the trials set before him in general. The Stone is one of a pair, and when the two are reunited the way is opened to Sky Keep beneath the Statue of the Goddess. The identical stone is lodged in a one-eyed bird statue located on Skyloft near the entrance to the Waterfall Cave. When Link inserts his stone into the empty eye socket, the bird statue turns around, opens its beak and fires a cannon ball at the Isle of the Goddess and at first, nothing seem to happen, but suddenly the ground starts shaking and the bottom of the brakes apart, unveiling the Sky Keep. It is there; in Sky Keep, that the almighty power that is Triforce is hidden. then spits out a number of orbs with clawshot targets as their faces which Link, with his Clawshots, uses to reach Sky Keep.

The statue that holds the Stone of Trials turns 180 degrees at night, rendering it impossible to open Sky Keep at night.