Inside the Egg
After finally gathering all eight of the musical instruments throughout the island, Link goes to the egg on top of the mountain to attempt to wake the Wind Fish.
He plays the Ballad of the Wind Fish that he learns from Marin, the girl from Mabe Village, and the egg cracks open, giving Link an entrance as he walks inside.
After going through a maze-esque sequence, Link finds himself deeper in the Wind Fish egg and comes across a boss rush that has him fighting against several of the bosses that he has already beaten, but they are now shadow forms and are much stronger.
They greet him by stating that they were born of nightmares and that they have been planning to take over the world by putting the Wind Fish to sleep. They say that the island will never disappear if the Wind Fish doesn’t wake up.
They then become angry with Link because of him disrupting their dastardly plans and the fight begins.
Link, of course, defeats the monsters and the last one leaves Link with one more message, stating that thanks to him, their world will now be gone.
After the nightmares are gone, Link gets transported to a trippy pedestal high above the sky in space where he is congratulated by the owl.
“Young lad… I mean, Link, the hero! You have defeated the Nightmares! You have proven your wisdom, courage, and power! As part of the Wind Fish’s spirit… I am the guardian of his dream world… But one day, the Nightmares entered the dream and began wreaking havoc.
Then you, Link, came to rescue the island… I have always trusted in your courage. I knew that you could turn back the nightmares. Thank you, Link. My work is done… the Wind Fish will wake soon.“
Yeah so basically the owl has been acting as the guardian of the dream world, guiding Link on this path of awaking the Wind Fish.
