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[Zelda] What is the TriForce?

I know nothing about Zelda so what is the TriForce? What does it do? Why is it so important?
gpt
According to lore, the Triforce is a sacred artifact left behind by the three goddesses of creation (also known as the Golden Goddesses): Din, Nayru, and Farore. Din, with her flaming arms, cultivated the land and created the red earth. Nayru poured her wisdom onto the earth and gave the spirit of law to the world. Finally, Farore, with her rich soul, created all the living inhabitants in the world to uphold the law. Their labors complete, they departed the world, leaving behind the ancient, all-powerful relic known as the Triforce. Din is associated with the Triforce of Power, the top triangle (currently possessed by Ganon), Nayru is associated with the Triforce of Wisdom, the left piece (currently held by the princess Zelda), and Farore is associated with the rightmost piece, the Triforce of Courage (usually held by the current incarnation of the hero, Link). 


As far as why the artifact is important, the Triforce itself is immeasurably powerful. With command of all three pieces, any wish can be made and it will be so. Controlling the Triforce is literally controlling the world, making the user akin to a god. But to actually command it is a tricky thing. Upon touching the Triforce, unless the user's heart is perfectly balanced between power, wisdom, and courage, only the part that is most associated with their disposition will fall under their command. The other two will disperse, seeking the individual that best represents their particular characteristic. This occurred during the events associated with the Ocarina of Time, where the sorcerer Ganondorf obtained the sacred triangle (housed in the Sacred Realm). He obtained the Triforce of Power, and the other pieces went to Zelda and Link (where they appeared as a triangle glowing on the backs of their hands). Even with that single piece, Ganondorf was able to greatly amplify his dark magic, becoming nearly invulnerable and conquering the land of Hyrule. The other two pieces seem to have lesser powers, but to what extent is unknown. Thus began Ganondorf's quest to take the other parts of the artifact back, restoring the Triforce to its full power and allowing him to become as a god.