It took considerably longer than an hour. He worked through the text the way he'd once worked through a Linear B tablet fragment during his second postdoc, testing grammar against context, cross-referencing every recurring symbol against every other instance he could find on the page, filling three borrowed sheets of parchment with notes in a hand Celeste eventually admitted she could not read even though it was, technically, her own alphabet.
When he finally recited the incantation aloud, voice careful and precise around syllables that felt like chewing gravel, nothing happened. No light. No warmth. Not even the faint pressure he'd come to associate with a spell trying and failing to catch.
He tried again. And again, adjusting stress patterns, testing whether the grammar wanted an imperative mood or a supplicant one, whether the verb governing "blood" wanted to be read as a noun or a command. Frustration crept in at the edges, unfamiliar and unwelcome, the sting of a puzzle that refused to yield to a method that had never once failed him before.
"What happened?" Celeste asked, watching him with real concern now, some of her careful composure slipping.
"I don't know yet. That's the problem." Corren rubbed at his eyes, feeling for glasses that weren't there again before he caught himself. "The grammar's right. I'd stake my life on the grammar being right. Something else is missing."
They went back through it together, line by line, Celeste reading over his shoulder with a patience that surprised him given how much she stood to lose if this failed. It was her voice, actually, that found it: reading a marginal gloss aloud in her own tongue, one she'd skimmed past twice without registering because the handwriting was so cramped it barely qualified as legible. A single phrase, easy to miss: the tongue of the covenant answers only the blood that made it.
"There it is," Corren said, something between relief and irritation warring in his voice. "It's not a grammar problem at all. It's a blood requirement. The incantation isn't asking for the right words. It's asking for the right speaker." He looked up at her, and whatever crossed his face in that moment, sharp and unplanned, was apparently transparent enough that she went very still. "It has to be you, Celeste. Not me. You're the blood the covenant was written for."
"But I can't even read it," she said, panic edging into her voice. "I don't know the words. I don't know the grammar. Everything you just spent hours reconstructing, I have none of it."
"Then I'll teach you," Corren said, and meant it exactly the way he'd once meant it to his own mother, a lifetime and a language ago. "Sit."
He spent the next hour walking her through pronunciation the way he'd once walked graduate students through their first attempts at a dead tongue: patient, exacting, correcting the placement of her tongue against her teeth for a fricative that didn't exist in her native speech, making her repeat single syllables a dozen times before letting her string them into a full line. Celeste proved a better student than he'd expected, quick in a way that had nothing to do with magical talent and everything to do with sheer motivation, the specific, focused hunger of someone finally being handed the one thing she'd wanted her whole life and refusing to fumble it.
When she finally spoke the whole incantation herself, voice trembling but the grammar clean, the room answered in a way it never had for him. Light bloomed outward from her chest in a column bright enough to throw stark shadows up every shelf around them, and symbols Corren didn't recognize even with every ounce of his training kindled into being above her head, resolving slowly into the unmistakable shape of a crown made entirely of light. Her eyes, when she opened them, had gone the color of a lit lamp, and from her back, in a rush of displaced air that scattered loose parchment across the floor, two wings unfolded, white as anything Corren had ever seen, feathered down to individual barbs so fine they looked painted rather than grown.
He found himself on one knee before he'd consciously decided to kneel, the old habit of scholarly awe transmuted into something closer to reverence for a thing he had helped uncover but could never himself have wielded. Celeste laughed, delighted and disbelieving, and reached down to pull him back to his feet, and in the giddy rush of the moment she leaned in and kissed the back of his offered hand before either of them had quite thought it through.
"Why didn't it work for me?" Corren asked once the light had settled and the wings had folded back into whatever unseen place they lived when not summoned, more curious now than frustrated. "Everything else I've touched in this kingdom answers to grammar. Hart Clan healing, the fire chant, storage magic, none of it ever once asked me who my parents were. Only this."
Celeste considered the question with the seriousness of someone turning over a piece of her own family's oldest mystery. "Maybe holy magic isn't like the others," she said slowly. "The others are just... craft, passed hand to hand, forgotten and found again. This is a covenant. A promise made between Heaven and one bloodline, specifically, on purpose. A promise doesn't care how well you can recite it if you aren't the one it was made with."
"That's the cleanest answer I've heard for it," Corren admitted, filing the distinction away with the same careful precision he filed everything else that mattered. Every other clan's magic he'd learned, every chant he'd corrected, worked because mastering the language underneath it substituted for a blood-right that most casters leaned on out of habit rather than actual necessity, an unspoken loophole nobody else in this world seemed to have noticed yet, let alone questioned. Amniel magic didn't run on that same loophole at all. It ran on a promise that named its recipient once, permanently, and Corren, for all his gifts, had never been named in it. He wasn't sure yet whether that distinction comforted him or unsettled him. Possibly both.