The war that swallowed Prythian — Hybern against the joined courts and the mortal realm, fought over the wall, the Cauldron, and the right to remake the world.
The War with Hybern
“And Nesta Archeron pointed. One finger—at the King of Hybern. A death-promise.”
ACOWAR
The conflict that breaks open the second ACOTAR arc — the island kingdom of Hybern, ruled by its ancient King, moving to tear down the wall between the mortal and faerie lands and reclaim dominion over humanity with the stolen power of the Cauldron.
The war Feyre and the Night Court spend ACOMAF and ACOWAR trying to prevent, then survive: broken treaties, courts forced into uneasy alliance, sisters dragged into immortality against their will, and a final battle on the human border where the cost of victory is counted in the dead. We still aren't recovered.
The cause
Why the war came
Five centuries of uneasy peace behind the wall — the magical barrier raised after the first great war to divide faerie Prythian from the mortal world. The King of Hybern, ruler of the island kingdom that never accepted that settlement, sets out to tear it down, reopen the human lands to faerie conquest, and bring back the age when mortals were chattel. To do it he needs the Cauldron, the primordial object of creation-magic from which all things were made — and the means to wield it.
The stakes
The Cauldron and the wall
It turns on objects of immense power. The Cauldron is the source the King means to weaponise — to unmake the wall and remake the world to Hybern's design. Around it gather the conflict's defining horrors and turning points, the forced transformation of mortals into High Fae among them — the act that drags the Archeron sisters into immortality against their will and seeds consequences that ripple far past the war itself. We're still feeling them.
The alliance
Courts forced together
No single court could stand against Hybern. The spine of the war is the struggle to forge an alliance out of Prythian's fractured, mutually suspicious courts — and to pull the mortal realm into a fight its people barely understand. The Night Court, Feyre and Rhysand at its heart, works through ACOMAF and ACOWAR to assemble that coalition, racing Hybern's advance while the King's agents move to divide and pick off the courts one by one.
The reckoning
The final battle
It ends in a pitched battle on the human side of the border, joined fae and mortal forces meeting Hybern's army in the open. The costliest moment of the arc — alliances tested to breaking, the dead counted on both sides, the King of Hybern brought down at last. Among the most charged threads: Nesta Archeron, pointing one finger at the King and making it a death-promise. Of all those the Cauldron wronged, she's the one who marks him to die.
The legacy
What the war left behind
Victory doesn't come clean. The war redraws the map of Prythian, hardens and remakes the people who survive it, and leaves wounds — grief, trauma, unfinished reckonings — that carry straight into the stories after. The hinge of the whole second arc: the catastrophe everyone tried to prevent, the crucible that forged the Night Court's family into what it becomes, and the war whose ash settles over everything after. We never recovered.
The war's key figures
Who fought it
Swipe to meet them all
From the page
Canon lines
“And Nesta Archeron pointed. One finger—at the King of Hybern. A death-promise.”
ACOWAR
The File
- What
- All-out war waged by the Kingdom of Hybern to destroy the wall and re-enslave the mortal realm, using the Cauldron's power
- When
- The central conflict of the second ACOTAR arc — building through ACOMAF, fought and resolved in ACOWAR
- Where
- Across Prythian and the mortal lands, culminating in the final battle on the human side of the border
- Aggressor
- The King of Hybern, wielding the stolen Cauldron
- Opposition
- The joined courts of Prythian, the human armies, and allied forces drawn together against Hybern
- Outcome
- Hybern's defeat and the death of its King; the wall undone and the cost paid in fae and mortal dead
We're Caffeine and Curses. The Library started as my design research — I can't put the war with Hybern on a shirt without knowing the Cauldron is darkest iron and big enough to bathe in — so we keep the notes here where everyone can use them. The pages are fan-made, not official; the licensed designs are in the shop.
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A Court of Thorns and Roses, ©2015-2021, Sarah J. Maas.