Ending Blow

From Zelda Wiki.org

The Ending Blow is the first Hidden Skill that is taught to Link by the Hero's Spirit in Twilight Princess. It is the only Hidden Skill that must be learned in order to advance through the game.

Once a foe is knocked down, the player will be prompted to press the Action Button on the controller when "Finish" appears on the screen. If the button is thus pressed, Link will dispatch the downed foe with a jump and a downward thrust of his sword. However, if the enemy moves out of the way, Link will be temporarily vulnerable while trying to pull the sword out of the ground. The Ending Blow is a decisive stroke that will eliminate any enemy if properly executed.

Torch Slugs are the only foes that will prompt a Ending Blow "Finish" without taking damage, however, they will emit a burst of flames that will fling Link off before he has a chance to make contact. Due to the control setup, this also makes a targeted Jump Attack impossible on a Torch Slug.

The Ending Blow stage-one. [Knocking down your enemy]

The Ending Blow-stage two. Link jumps up in the air, and stabs the enemy with his sword right in the middle of its torso. Link then pulls out his sword with victory...

Where to Find the Ending Blow

The Ending Blow is found while attempting to get to the Forest Temple, right after the monkey guides Link through the fog.