"You got the Blessed Idol! This carved wooden statue looks like it's supposed to inspire gratitude. It also looks like the stone statue on the upper floor."
— In-game description

The Blessed Idol is an item from The Legend of Zelda: Skyward Sword. It is used as a key to enter the boss room of the Ancient Cistern, in which Koloktos is found. In order to open the door leading to the dungeon's boss, Link must correctly maneuver the statue so that it fits into the lock.

See also