Mogma

Mogmas are a race featured in Skyward Sword. They live on Eldin Volcano 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 Fi's dowsing abilities to find the pieces and subsequently use the Digging Mitts to dig them up.

Trivia

 * "Mogma" may be a portmanteau of the Japanese word for mole,, and "magma".