Staldra

Staldra appear as a common enemy in Skyward Sword. They can be found in the Skyview Temple and the Lanayru Mining Facility.

Strategy
To defeat Staldra, Link must use his sword to cut off all the heads at once, as they will grow back if he doesn't. To do this, Link has to perfect slice all three heads in the way they are positioned. If a Staldra has all three heads lined up in a single row, he would have to perform a horizontal slice to bring down the beast. They can also be stashed diagonally if they line up. The easiest way to defeat it is to Shield Bash it when it lunges, then attack while it is stunned.

Trivia

 * Staldra is a portmanteau of "Stal" and "Hydra". Stal is a prefix used to denote skeletal creatures, such as the Stalfos.
 * Gleeoks are similar, multi-headed creatures that also seem to be related to the Hydra.
 * It is possible to kill the beast with a bomb if all the heads are looking in the direction of the bomb.
 * All Staldras drop a single Red Rupee when defeated.