Light Force
The Light Force is a mystical power given along with the Picori Blade. It runs in the blood of the females of the Royal Family. Vaati attempts to drain it out of Princess Zelda. Not to be confused with the Triforce. There is, however, growing speculation that the Light Force marked the beginning of the Triforce. (Although, the Triforce should have already existed, as it is seen in Hyrule of that game, on banners.)