Mogma

Mogmas are a race featured in Skyward Sword. They live in a mountainous region and have the ability to dig into and out of the ground.

History
At one point in the game, the Mogmas break apart a key to a nearby template and hide the pieces beneath the ground. As Link requires the key to enter the temple, Link must use Phi's treasure-detecting abilities to find the pieces as well as special gauntlets to dig them up.