How to beat Bonemass - Valheim

Discover where to find, how to summon, and how to beat Bonemass, the third boss in Valheim.


Bonemass is the third boss players can fight in Valheim. Unlike the previous two bosses, Bonemass requires a bit of preparation and is otherwise a significant hurdle players will need to overcome.

Where to find Bonemass

bonemass location valheim
Look for the vegvisir stones in the Swamps. These will add the Bonemass marker to your map.

To get the Bonemass marker added to your map, you will need to interact with the correct vegvisir. This runestone can be found in the swamp area, specifically in Draugr towers. Look out for towers with an internal stairway; the stone is typically on a sort of balcony.

How to summon Bonemass

cook their remains bonemass valheim
"Cook their remains" directs you to use 10 Withered Bones to summon Bonemass.

Much like how you must offer deer trophies to summon Eikthyr, you must offer a sacrifice to summon Bonemass. The clue on the back of the skull reads “cook their remains”. For those that have taken the time to farm iron, you may have an idea of what you must offer: Withered Bones.

Offer up 10 Withered Bones to summon Bonemass and begin the fight. You can find all the Withered Bones you need inside the Sunken Crypts that are dotted around the swamp biomes.

How to beat Bonemass

As for actually beating Bonemass, this one is going to be the first real struggle for a lot of players. Bonemass is resistant to just about every form of attack (slashing, piercing, etc) but he is especially weak to one thing: blunt. It is highly recommended you spend some time collecting iron to make an iron mace for you and your team. You can even use something like the Iron Sledgehammer if you’ve found the merchant and purchased Ymir flesh.

bonemass guide valheim
It can be difficult to be aware of your surroundings during the Bonemass fight.

The other thing to note about the fight against Bonemass is that he does a lot of poison damage and summons Blobs and Oozers. To defend against this, use a cauldron and fermenter to create Poison Resistance Meads. This mead halves how long you are poisoned for and will make this fight significantly easier.

When you have your iron mace, poison resistance meads, and your food, you should be in a good position to summon Bonemass and start hacking.

The Bonemass fight is really inelegant. The only way to damage him is to be right up in its face, swinging with the mace. If you’ve got multiple people, take turns running in and trading aggro while someone hits. The Eikthyr buff will help with stamina consumption as you’re running around.

bonemass fight shelter resting valheim
Take a moment to get your health back by finding a tree you can sit inside that offers shelter. Throw down a campfire to get a Rested buff.

If you do take too much damage, back off and find a place to heal. A good idea is to put a campfire near some of the large trees that you can't chop down. The little crooks and nooks in these trees actually offer shelter and comfort, which will help get your Rested buff back.

You will also want to be clearing enemies before things get out of hand. Take the time to clear Skeletons, Draugr, Greydwarfs, Blobs and even any Wraiths that might join in on the fun.

bonemass trophy ability valheim
The Bonemass ability grants resistance against physical damage. Consider having one player use this and another using Eikthyr.

When you do manage to defeat Bonemass you will receive a new item called the Wishbone. This can be activated like a piece of armor or the Megingjord and will reveal to you buried riches, like various ores and chests. Remember to put the Bonemass trophy on the Sacrificial Stones to receive the Bonemass ability, which offers resistances against physical damage (blunt, slash, and pierce).

The fight against Bonemass is extremely challenging if you start it ill-prepared. But, bring along a blunt weapon, poison resistance mead, and plenty of food and you’ll be able to not only survive but bash this monstrosity back into the swamps. Be sure to check out the Shacknews Valheim guide for more boss and resource guides.

Guides Editor

Hailing from the land down under, Sam Chandler brings a bit of the southern hemisphere flair to his work. After bouncing round a few universities, securing a bachelor degree, and entering the video game industry, he's found his new family here at Shacknews as a Guides Editor. There's nothing he loves more than crafting a guide that will help someone. If you need help with a guide, or notice something not quite right, you can Tweet him: @SamuelChandler 

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