Gaepora is the obvious person to ask for help about the Triforce, and while he’s heard of it, its location isn’t recorded in any of his texts. He has an idea for who might know: Levias, the sky spirit who’s watched over Skyloft for ages. Unfortunately, Levias is rumored to be somewhere in the Thunderhead; Instructor Owlan was sent to determine how true those rumors are. Owlan says when he saw Levias, Levias attacked him, like he was possessed. Sensing that Link isn’t going to give up on talking to Levias, Owlan teaches him a special Spiral Charge attack he can do with his Loftwing, but first there’s a trial: Link has to use the attack to destroy ten targets in two minutes. Hitting the targets isn’t too hard, but combined with finding the things and the flying controls, it took a few tries to pass.
To lure Levias out, Link and Scrapper bring an offering of pumpkin soup from the Lumpy Pumpkin to an island marked with a rainbow in the Thunderhead. Scrapper sets the soup down and heads off as Levias, Great Spirit of the Skies comes out of the clouds for a boss fight. Levias has four parasitic eye stalks growing from him, so Link needs to destroy them with Spiral Charges. Once they’re gone, a different eye appears from Levias’ back, and Link lands on his back to fight the ocular parasite causing Levias’ foul mood, Bilocyte. This boss fight is entirely the traditional game of whacking attacks back to hit the boss, with the added twist that left/right sword swings send the attack back in the same direction – needed to hit Bilocyte’s wings and, late in the fight when it starts trying to get out of the way of the return volleys, eye. After enough hits, Bilocyte is defeated.
Between the offering of soup and Bilocyte’s destruction, Levias is returned to his senses and the Thunderhead becomes less thundry. Levias recognizes Link as the chosen hero, and tells him what he knows. He doesn’t know where the Triforce is, but knows what the key is: another song, the Song of the Hero. This song was split into four parts, three for the dragons of the land, and one for Levias. Levias will teach Link the final part once he’s learned the other three.
Back on Skyloft, Sparrot, the fortune teller, has broken his crystal ball and no longer appears in the Bazaar. Link goes to check on him, and he’s despondent until he remembers Link got the windmill piece from beneath the clouds. He asks Link to search for a replacement, and Link agrees. Sparrot says the broken crystal ball came from a building atop a mountain, which suggests the Earth Temple. And sure enough, that’s where the replacement ball can be found; Fi calls down Scrapper, who hauls the ball up to Sparrot (and drops it on the table; luckily, it doesn’t break). Sparrot offers a discount on a future reading, and gives Link five Gratitude Crystals.
I don't know if or how I would have discovered this next part without the Skeikah Stone and checking to see if the minigame had a unique reward. It requires visiting an island Link has one reason to visit once (a Goddess Chest), then visiting Beedle, which if you’ve bought out his merchandise, is typically not very pleasant (he drops Link out a trap door if he tries to leave without buying anything). Strich has moved from the Lumpy Pumpkin to an island in the Thunderhead [1] with lots of bugs, and is running a minigame to catch 5 or 10 specific bugs (easy and hard modes) as fast as you can. Visiting him activates a quest where Beedle has lost his pet Colossus Horned Beetle, which Strich has. Strich wants to keep the beetle, but agrees that if Link can complete his hard minigame fast enough, he’ll return it. Once that’s done, Link takes the Beetle back to Beedle. Beedle will only talk about the quest on his home island at night, so Link sleeps in the bed aboard his ship to get there. In addition to the five Gratitude Crystals for returning the beetle, there’s a loose crystal on the island. (Beedle also offers Link 50% his next purchase, but since his inventory’s cleaned out…) That brings Link’s total to 70; not quite enough to fully satisfy Batreaux, but getting closer and earning 600 rupees for this much effort.
Next: I just sealed this boss! Can we keep it sealed for ten minutes?
[1] Although the storms have subsided, it’s still a separate area and really, very little has changed within aside from the background.