The Witcher 3: A Guide To The Battle Of Kaer Morhen

The Battle of Kaer Morhen is one of the most pivotal events in the story of The Witcher 3. During this quest, you’ll reconnect with old buddies, save Ciri from the Wild Hunt, and even suffer some losses. It’s the big climax at the end of its respective story arc, and what you do next will determine the fates of many characters and plotlines.

It’s also a lengthy quest with a lot going on at once, so you might need some tips and guidance on how to complete it.

How To Start

This main quest will start immediately after finishing the Isle of Mists. You don’t need to start tackling the objectives, though. Kaer Morhen will be open for you to explore, with a few hidden things to find, monsters to fight, as well some of the characters hanging around if you want to get to know them a bit better.

However, it’s important to note that you won’t be able to fast travel during this quest. You’ll hopefully have finished the various Brothers in Arms quests before this, too.

Fail Triggers

It’s crucial to note that there are a ton of side quests and other things you must do before you finish the Isle of Mists quest, as they will fail and become inaccessible if you don’t.

Some of the more important quests that must be finished before the Battle of Kaer Morhen include the ones involving the Bloody Baron, Triss Merigold, Skellige’s new ruler, Keira Metz, the fate of Redania, and the Brothers in Arms quests. Make sure you’ve completed the main story arcs of the earlier parts of the game before you miss your chance.

Brothers in Arms

Just a bit more preparation before getting into the actual battle itself. You’ll definitely need some help for this fight because the few of you that are at Kaer Morhen to start won’t be enough.

Lucky, Geralt has met quite a few people in his journey that can offer their help. The various Brothers in Arms quests are very helpful in finding helpers and asking them for assistance.

Some of the optional people you definitely should ask are Ermion, Zoltan Chivay, and Keira Metz. Keira must be asked much earlier during the For the Advancement of Learning quest, depending on your choices during that story arc.

The Meeting — A Choice to Make

Grab some swords, repair kits, and make sure all your potions, bombs, and abilities are set and ready to go. It’s finally time to start. The first part of this quest will involve a short meeting with the allies and fighters on your side.

You’ll have to make an important choice here: brew some potions or create traps. If you decide to go for the potions, you’ll get some Superior Swallow, Thunderbolt, and a runestone to give you some extra power. If traps are your choice, they’ll be installed around the keep, which can help take down some enemies who are unfortunate enough to trigger them.

The second important choice concerns digging out the armory or repairing some damage to the fort’s walls. If you go for the armory, you’ll receive a decent silver sword, the Rose of Shaerrawed. If you decide to patch up the holes, there’ll be fewer waves of the Hunt to fend off during the attack.

Geralt can briefly talk to Ciri here, though it’s optional and not required by any means. The storage chest will also be accessible at this point.


After the meeting wraps up and your preparations are finished, the battle will begin. There are three portals that the Hunt will use to send in soldiers. Work with Lambert and Letho (if he’s present) to close them up using the Dimeritium Bombs or Yrden.

This is fairly straightforward and simple, you might just have trouble fighting off all of the soldiers. It’s wise to use Yrden and save your bombs for later, though.

Ciri’s Time

Next, you’ll switch to playing as Ciri. Triss is in trouble and needs your help. You can use Ciri’s powers in tandem with a magic amulet that Triss gives you.

The amulet will summon fireballs that cause huge damage in an area around you, though they’ll hurt Ciri too, so be careful. Kill the enemies around Triss using the amulet and Ciri’s Charge attack, and you’ll finish this portion with ease.

Return to the Keep

Next, you’ll switch back to Geralt, who is with his horse, Roach. You will need to race back to the keep as fast as possible, dodging attacks and fireballs on the way.

After arriving, Vesemir will be fending off some of the Hunt. You can close the gate with the lever past where Vesemir is and cut off the Hunt from attacking inside the fort.

If Ermion was recruited for this fight, there will be gas traps that can be ignited with Igni and cause some damage to the Hunt.

During this portion of the battle, Lambert is in a pinch. If you didn’t recruit Keira, you’ll have the option to save Lambert yourself. If Keira is there, though, she saves you the trouble and rescues Lambert herself. The two go on to become lovers later.

Help Eskel

In the next section, Yennefer’s powers will start to diminish. The soldiers will be making gains against the keep, and Geralt will have to fight quite a few of them off before moving on to helping Triss.

Next up is another portion where you play as Ciri. Eskel is fighting Caranthir and needs help, and you will have to assist him as Ciri. Then, once you’ve fought off some enemies, open the gate.

Back to Geralt

Return to playing as Geralt, and you’ll have to close some more portals. There are Dimeritium Bombs in crates if you need some more once the portals are closed, but they’ll replace the higher versions if you have them, meaning you’ll have to craft them again later. Alternatively, you can just use Yrden like earlier to avoid running out of bombs.

Triss will call for help and you’ll need to go help her again. Once you get near enough, though, the battle will automatically end and a cutscene will play.


During this cutscene, a lot happens. The Hunt freezes everyone solid except Vesemir. He’ll try to save Ciri but Imlerith will stop him. Then, Eredin shows up. Vesemir stabs him with a dagger, but Eredin is quick to retaliate, killing Vesemir. This enrages Ciri so much that she loses all control and lets out a deadly blast that kills almost all of the Hunt in the area, causing Eredin to retreat.

Once the remaining characters thaw out, Geralt will run to Ciri’s side, comforting her. They’ll be heartbroken over the loss of Vesemir, and Geralt will have two dialogue options for Ciri. Your choice doesn’t really matter here, so pick whichever you prefer. Ciri will take Vesemir’s wolf medallion, and the quest finally ends.

What Happens Next?

Even though you’ve successfully completed the quest, it’s nice to know what comes next. The first thing that will happen is a funeral service for Vesemir. The next quest, in which that cutscene takes place, is called Blood on the Battlefield, and it’s mostly composed of the aftermath of the battle. Each of the allies will give you an update on what they plan to do next.

During this quest, there are some crucial decisions you will have to make that will determine whether Ciri lives or dies and what her role will be going forward. Read this guide on Ciri’s endings for more information.

With the battle completed and the funeral done, your time defending Kaer Morhen is finished. You’ll next need to track down the leaders of the Hunt and accompany Ciri on her quest toward whatever’s next.

NEXT: The Witcher 3: 10 Most Tragic Endings for Characters, Ranked

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Michael is a journalist with several years of experience writing about video games, television, and social issues. He loves indie platformers, Pokémon, and Hack ‘n Slashers.

Currently playing: Cities: Skylines, Hyrule Warriors, and Stardew Valley.

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