The final Great Fairy appeared before Link and Alel as they were transported back to Kakariko Village.
"Thank you, Hero and Alel. All of the Great Fairies and all of the Light Spirits of Hyrule have been restored."
But then, Link sensed something wrong. He drew his Four Sword. The blade was black and the hilt was white.
The...The Four Sword...!" Alel cried out.
"What's happened to it!?"
"The Twilight has eroded the Four Sword's power." The Great Fairy answered.
"Though the two blades are similar, the Master Sword and the Four Sword are still two different swords. The Master Sword being blessed by the power of the Twilight Realms' Sols is proof of this. "
"What are you saying...? That the Master Sword is more...sacred than the Four Sword?" Alel asked, confused.
"No." Said a distant voice. Suddenly, a bright flash of light appeared above Link, Alel and the Great Fairy. From the shine of light, a pair of large wings emerged along with the body of an avian. It was the Light Spirit, Eldin.
"The sacred Four Sword was a blade created and used to fight against the evils in the ancient eras of Hyrule. Evils that, compared to now, would pale in comparison. "
"I see...but how do we restore its power?"
"Restore its power by restoring the powers of Hyrule's past eras. You'll find what you seek beneath Hyrule Castle." And then both the Great Fairy and the Light Spirit disappeared.
"Hyrule castle...? But why? Well...I guess we don't have a choice do we?"
Alel and Link were getting ready to leave when they were stopped.
"Wait. Only part of the problem has been presented." The Great Fairy said suddenly as she reappeared.
"What do you mean...?" Alel asked worried.
"The answer you seek lies in the desert prison. The once chamber of the Mirror."