Link goes mad from a revelation.
This had started as a simple enough supply run involving flinging himself out of sky towers. Link planned an optimized route to get food and a ruby circlet, while grabbing tools and restoring stuffed seals. It wasn't that Link doubted his ability to keep a fire going in a blizzard. Link wanted to maybe avoid burning down all of Hebra on the way to Rito Village while having some extra foodstuffs to share.
Link found the Geoglyph he had marked. He then cursed angrily under his breath as Rauru helped him scan for the puddle. It took too long in his opinion. Link was on a strict schedule tonight.
Rauru hovered by Link during the trance. Link was immediately greeted with "What did you see, Link?"
"I saw Zelda talking to your sister. Mineru was helping explain about the Secret Stones, how they worked, and Draconification..."
Rauru spoke slowly and rephrased his thoughts twice to make sure they translated on the Purah Pad. He ended with a successful translation. "We were hoping you would have clues as to what occurred after I sealed the Demon King away, but I suppose it would be too much to expect the exact answer we wanted from a random memory."
"The other memories feel pretty topical to me. Draconfication, though?" Link had, selfishly, wondered if he'd see a memory of Zelda with a presentation where she said 'Hey, I froze myself in magic crystal using time powers, here's the temple and how to open it.' Or just as selfishly and more egocentrically, her saying what she thought of Link.
The two men fell into thoughtful silence as the translator app on the Purah Pad remained on standby.
Link and Rauru practiced chatting about dragons a week ago. Link had been baffled about Rauru's insistence that there were three great dragons watching the land. He pointed at the sky during that conversation to dragon number four. Now something clicked in Link and Rauru's brains with the same horrible certainty as a Death Mountain mine cart careening towards a section of missing rails.
"Maybe," Link said, "It was exactly what she wanted to tell me."
The clicking of the mental minecart wheels sped ahead. Link's schedule for the night crumbled when run over by it.
Link frantically snagged another set of apples for his supplies as he practically flew across Hyrule on his way to the next glyph. He forgot about the sand seal plushies. He did not deviate from the quickest trail to the geoglyph. He only slowed a moment to snag a few quick supplies because the Rito needed them. Link did not sleep that night as he relentlessly tracked each glyph down.
(Later, he would come to regret not activating the teleport points at the shrines he passed by. Link paid a tax for stupidity far too frequently for his tastes.)
Purah recoiled as Link's feet slammed onto the landing floor beside her. His arms were laden with scales, horn fragments, fangs, and a massive lock of golden hair. She'd never seen such a crazed look in his eyes as she'd missed the raid on Hyrule castle.
"PURAH, I NEED YOUR RESEARCH ON THE AGE RUNES, NOW!" The dark circles under them betrayed his lack of sleep over the past couple days. "I KNOW WHERE ZELDA IS AND, shut up, Rauru, I'm fine." Link swayed on his feet. Attempts to draw the Master Sword had earned him a good flinging off or two. "Here's some of the materials I got off her. From the Light Dragon."
"...what," asked Purah.
Link stared into her eyes. "Zelda is that Dragon. Age reversal runes. NOW."
Link toppling over in a faint thwarted Purah's many questions. She enlisted Josha's help dragging Link downstairs to a bed. Purah gathered the dropped scales and whatnot into her study space, then waited ferociously.
Short chapter, but VERY important. I wondered why no one brought up the runes Purah used on herself. There are a few ways I can think of where they might have dismissed the runes as an option because drama but nope. No one mentioned them.