Threshing DayRiders Quadrant
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Enter the Vale

Basgiath War College · Riders Quadrant

Threshing Day POV

October 1 is always Threshing Day. The first-years of the Riders Quadrant walk into one forested valley and find out whether a dragon bonds with them, ignores them, or kills them. This page tells that day thirteen times.

A cold stream through a dark pine valley at dusk.
One valley, one day. The water is the only thing every vantage shares.

Spoilers: Threshing Day

This section contains material from later in the series.

The Valley, Thirteen Ways

Gated at Threshing Day. The module names riders, dragons and outcomes, so it stays closed until you open the gate.

The day at a glance

Date
October 1, every year, regardless of weekday
Place
A bowl-shaped forested valley southwest of the citadel
Perspectives
Thirteen, one per story
Narrators
Riders only. No dragon POVs
Arrangement
By year, not as a single hour
Frame
Testimony collected later by two dragonkind professors
Read after
Onyx Storm
Module gate
Threshing Day spoilers

Why vantage is the whole point

A Threshing is not one event. For a cadet on the valley floor it is a walk, a wait and a decision made by something much larger than them. For a rider already bonded, it is a problem of keeping other people alive. For anyone watching from above, it is geometry: where the dragons are, where the crowds are, and how quickly a gap closes.

That is the argument for telling the day thirteen times. One account can describe what happened. Thirteen accounts can describe what the day was, because the parts that one rider could not see are exactly the parts another rider was standing in.

The companion collection also fixes something the main series leaves implicit. Fourth Wing gives one first-year account of Threshing, and that account is filtered through a single set of priorities: survive, protect the people beside you, and do not look a red in the eye. The other twelve riders had different priorities, and the day looks different from inside each of them.

Four vantages and what each one cannot see

A reading aid rather than a canon diagram: the books do not describe a system of vantage points. It is how thirteen accounts of one day fit together.
VantageWhat it seesWhat it cannot see
At the valley mouth, on footThe order cadets go in, who hesitates, who turns back before the tree line.Anything past the first stand of redwoods.
Under the canopyIndividual dragons, the moment a choice is made, the ground at close range.The rest of the valley, and the reason a dragon moved at all.
In the air, already bondedThe bowl as a shape: where the dragons are, where the crowds are, which gaps are closing.Faces, decisions, and anything smaller than a squad.
Afterwards, in testimonyWhat a rider chose to record, and what the collection chose to keep.What was left out, and why.

The shape of the day

The first-years go in

October 1, whatever day of the week it falls on. The valley is forested, bowl-shaped and ringed with redwoods, boulders and canyon cliffs.

The choice

A dragon bonds with a cadet, ignores them, or incinerates them. Dragons choose; cadets do not. What each dragon values is described as subjective.

The return

Bonded cadets are elevated to riders, issued riding leathers and given a private room. Cadets who are not chosen may repeat the year. Some do not come back.

The record

The collection presents the day as testimony collected afterwards by two Basgiath dragonkind professors and transcribed from Navarrian.

Spoilers: Fourth Wing

This section contains material from later in the series.

Vantage records, gated at Fourth Wing

Established Brennan Sorrengail Dragon: Marbh. In the valley: Not yet established in the novels. His own Threshing is one of the thirteen stories in Threshing Day (2026). One of the thirteen Threshing Day viewpoints. In the novels he is the brother Violet believes dead, and his survival is the closing reveal of Fourth Wing. His dossier is the only place in the collection where a Sorrengail sibling rides before Violet does, and his later role as a mender makes him the clearest example of what a Threshing bond turns into over a career.
Established Mira Sorrengail Dragon: Teine. In the valley: Not yet established in the novels. Her own Threshing is one of the thirteen stories in Threshing Day (2026), and it is where her bond with Teine is covered. One of the thirteen Threshing Day viewpoints. In the novels she is the sister who tries to keep Violet out of the Riders Quadrant and fails. Mira is a serving officer by the time Violet reaches the quadrant, so her record is the one that connects the ritual to the career that follows it.
Established Xaden Riorson Dragon: Sgaeyl. In the valley: Bonded Sgaeyl at his own Threshing, two years before Violet enters the quadrant. Sgaeyl had gone fifty years without a rider and broke the tradition against bonding the descendants of former riders to take him. One of the thirteen Threshing Day viewpoints. His story was also posted free on Rebecca Yarros's own site, so it is the one chapter of the collection that is publicly readable outside the book. He is the only viewpoint who already carries the responsibility for other cadets, so his Threshing is the one that shows the day from inside a command structure rather than from inside a first-year fear.
Established Garrick Tavis Dragon: Chradh. In the valley: Bonded Chradh, a brown scorpiontail, at his Threshing. Chradh had previously bonded a rider from Garrick's own bloodline, which is part of why the pairing carries more than one signet. One of the thirteen Threshing Day viewpoints. He is the marked one Xaden trusts with the work that cannot be written down. His record is the bluntest of the thirteen on what the quadrant does to a cadet who has already lost his family to it.
Established Dain Aetos Dragon: Cath. In the valley: Bonded Cath at his own Threshing, a year before Violet entered the quadrant, and was a second-year squad leader by the time she arrived. One of the thirteen Threshing Day viewpoints. He is Violet's childhood friend, and his loyalty to the Codex is the pressure that defines his first two years. Dain is the rule-follower of the thirteen, which makes his account the one that shows what the Codex asks of a rider on the day the Codex cannot help him.
Established Bodhi Durran Dragon: Cuir. In the valley: Bonded Cuir at his own Threshing. The pair fight together from the Battle of Resson onward as part of the rebellion. One of the thirteen Threshing Day viewpoints. He is family to Xaden in the way that matters most in the quadrant, which is to say he is the one who stays. Bodhi carries the Riorson name without carrying the command, so his account is the one that shows what loyalty costs a rider who is not the leader.
Established Rhiannon Matthias Dragon: Feirge. In the valley: Bonded Feirge at Threshing and manifested object summoning through the bond. Rhiannon rises from cadet to squad leader within a year. One of the thirteen Threshing Day viewpoints. She is Violet's closest friend in the quadrant and the first person to treat her as a rider rather than a liability. Her account is the one that shows the ordinary version of the day: a capable cadet with no dynasty behind her, hoping a dragon picks her.
Established Sawyer Henrick Dragon: Sliseag. In the valley: Failed to bond at his first Threshing, repeated the entire first year, and bonded Sliseag on the second attempt. He is the canonical proof that a cadet who is not chosen can come back and try again. One of the thirteen Threshing Day viewpoints. He is the underdog of the thirteen and the only one whose first Threshing failed. He is the one rider in the collection who has stood in the valley twice. Nobody else can describe what the second walk in feels like.
Established Ridoc Gamlyn Dragon: Aotrom. In the valley: Bonded Aotrom, a brown swordtail, at Threshing and manifests ice through the bond. One of the thirteen Threshing Day viewpoints. He is the jokester of the thirteen, which is the role the quadrant needs and rarely rewards. His account is the one that shows a cadet using humour as a survival strategy on a day that kills people.
Established Liam Mairi Dragon: Deigh. In the valley: Bonded Deigh, a red daggertail, at his own Threshing. Deigh is killed by a wyvern at the Battle of Resson, and Liam dies with him, which is the series' clearest demonstration that no rider survives the loss of their dragon. One of the thirteen Threshing Day viewpoints. He is the kindhearted protector of the thirteen and one of the few riders in the series who dies on the page. His record carries the most weight of the thirteen, because a reader who has finished Fourth Wing knows how the story ends and comes back to the beginning anyway.

Spoilers: Iron Flame

This section contains material from later in the series.

Vantage records, gated at Iron Flame

Established Imogen Cardulo Dragon: Glane. In the valley: Bonded Glane at her own Threshing. In the novels the pairing is established in Iron Flame, where Glane is named and coloured. One of the thirteen Threshing Day viewpoints. She is the marked one who hates Violet on sight for her mother name and ends up training her. Imogen is the collection one clear look at a rider whose family was executed by the institution she is now conscripted into.
Established Sloane Mairi Dragon: Thoirt. In the valley: Bonded Thoirt and manifested the rare siphoning signet. Siphoning is the ability that makes her final act in Iron Flame possible, since it lets her move power from one person into something else entirely. One of the thirteen Threshing Day viewpoints. She enters the quadrant in Iron Flame believing Violet may have been responsible for her brother death. She is the newest rider of the thirteen and the one carrying the most family history into the valley, which makes her chapter the bridge between the collection and the novels.
Established Aaric Graycastle Dragon: Molvic. In the valley: Entered the Riders Quadrant in Iron Flame as a first-year under the name Aaric Graycastle and bonded Molvic. His exact Threshing is not described in the novels. One of the thirteen Threshing Day viewpoints. His true identity as Prince Camlaen Aaric Tauri is one of Iron Flame quieter reveals. He is the restless royal of the thirteen, and his account is the only one written by someone who chose the quadrant when he could have avoided it.

How the thirteen accounts differ

Spoilers: Threshing Day

This section contains material from later in the series.

The accounts fall into two kinds. Some riders went into the valley with a plan and had it taken apart: Brennan Sorrengail refused a squadmate's plan to move in numbers, climbed a central tree, and was mocked by Marbh for hiding before he leapt from the branch and earned the seat through spiral dives. Mira Sorrengail had a tree felled in front of her and took a talon through the thigh before Teine accepted her as a first rider, and she held her seat through the aerobatics despite heavy blood loss.

Others went in carrying something older than the day. Xaden Riorson led the first ten marked children into the quadrant, was ambushed, killed Prince Alic Tauri Baran with a sword strike, and watched Sgaeyl burn the bodies before she chose him. Garrick Tavis killed Alic's accomplice Lorne in the same ambush, and Chradh told him he had been chosen for his self-sacrificing nature and his bloodline.

And some riders were chosen for reasons that had nothing to do with the day itself. Dain Aetos was pressed by his father to bond a green, had Cath and a green swordtail approach together, and chose Cath after Cath challenged his allegiance. Bodhi Durran, tired of living in Xaden's shadow, rushed an unlisted blue dragon and was caught mid-air by Cuir, who told him he was chosen because he wanted power to end harm rather than to win. Imogen Cardulo had Glane begin channeling into her before she even mounted, because Glane had been bonded to Imogen's grandmother.

Treat these settings as reader-reported detail. The substance of each story belongs to the book, and this page does not reproduce it.

Sources

Questions people actually ask

A timeline of October 1 as thirteen riders experienced it. Each panel gives one rider, the dragon recorded for them, what they were doing in the valley and what their vantage adds to the day.

The thirteen riders of the companion collection: Xaden Riorson, Brennan Sorrengail, Dain Aetos, Sawyer Henrick, Sloane Mairi, Imogen Cardulo, Ridoc Gamlyn, Aaric Graycastle, Mira Sorrengail, Liam Mairi, Bodhi Durran, Rhiannon Matthias and Garrick Tavis.

Because her Threshing is already told in full in Fourth Wing. The collection deliberately gives the day to thirteen other riders.

Because the panels name riders, their dragons and what happened to them. That is the substance of the collection, and it reveals a death the first book spends its whole length preparing.

They all show a Threshing, which is always October 1, but the riders Thresh in different years. The collection is arranged by year rather than as a single hour.

Yes. The timeline is its own module. If you want to know which dragon would choose you, the game runs separately and takes about three minutes.

Ready to be chosen?

Your run takes about three minutes. The engine decides what answers.

Walk into the valley yourself

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