Therzie-Monstrum icon


Adds new monsters and mini-bosses to fight and tame for original Valheim up till Mistlands.

Last updated a week ago
Total downloads 61535
Total rating 21 
Categories Misc Hildir's Request Update Enemies Server-side Client-side
Dependency string Therzie-Monstrum-1.2.2
Dependants 211 other mods depend on this mod

This mod requires the following mods to function

denikson-BepInExPack_Valheim-5.4.1901 icon

BepInEx pack for Valheim. Preconfigured and includes unstripped Unity DLLs.

Preferred version: 5.4.1901
Therzie-Warfare-1.5.1 icon

Fills the weapon and shields gap in vanilla Valheim and with MANY new weapons and unique extras!

Preferred version: 1.5.1


// Join my discord -> Therzie Modding Discord //

Mod showcase:

Monstrum: Ashlands

Monstrum: Deep North

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Adding a total of 10 new monsters and 3 mini-bosses to fight and tame! Content expansions for Ashlands and Deep North also available!

Fox Razorback Black bear

Summon monstrous new mini-bosses for unique loot rewards!

Asmodeus picture Svalt Vryko picture

Enter a world of danger as you progress through the games biomes!

Rotting elk Crawler

All creatures drop custom materials and trophies which are used for weapon and armor recipes with the Warfare and Armory mod!

Golem Grizzly

Tame new creatures to aid you at your side, craft new saddles to mount your new companions!



-More mini bosses up till Mistlands planned!
-More monsters!

Warfare/Monstrum/Armory WIKI link:










KeyManager Disclaimer


It's recommended to remove your old Therzie.Monstrum.cfg from your config folder and let the game generate a new one on startup with new updates!

NEVER copy your generated keymanager folder/files from your BepInEx\config\ to your server or your friends/players, everyone needs to generate their own unique keymanager.

This error : [Fatal :KeyManager Therzie/Monstrum] Invalid Signature. Aborting. is caused because the clock on your operating system is set to the wrong time, change this to the correct time to fix it!


New locations get loaded on new world creation, you can use Upgrade World by Jere to add these new locations to your existing world.

Be sure to have this mod installed on both your client and server as admin and use the following console command: "monstrum"

ALWAYS make a backup of your world!

For Expand World configs please join my discord community and check the pins in the #config-share channel.


Want to get my mods translated in your own language? Join the discord for the template and help the community out by translating the template located in the #translation-share channel in your own language!


@Majestic, huge credits to Majestic for bringing Monstrum to it's current state!!

@DefendYourBase, big credits to DYB for teaching me a great deal of creature creation!!

@KG, big credits to KG for helping out with code!!

@All those who've supported my work!!


Like my work? All support is greatly appreciated as it allows me to buy new assets and software to keep on developing epic content for you!

Do you have feedback regarding this mod?

Let me know over at the Discord! -> Therzie Modding Discord

Changelog -> Please delete your old Therzie.Monstrum.cfg file to apply the latest changes!


  • Lowered Fox sound volume
  • Moved food for Ashlands/DeepNorth to the split off mods
  • Fixed some missing effects


  • Last fix for Svalt's boss door, promise :')


  • Re-added and fixed Svalt's door!


  • Removed Svalt firewall bug that blocked entry on servers
  • Fixed some translations


Big changes as Monstrum has been split into three mods for easier maintenance and giving players more freedom of choice on end game extension Monstrum will now be split into content up till Mistlands, Ashlands and Deep North content

  • Rebuild the entire project and fixed a lot of unnoticed errors
  • Temp. disabled Svalt's boss door till fix is ready
  • Moved all rug build pieces from Warfare to Monstrum
  • Added Mammoth and Ashen fur rugs
  • Moved the Lightning resistance mead from Monstrum to Warfare
  • All monsters now correctly drop loot after the corpse removal effect
  • Replaced Razorback with a new model for better animations and boar riding
  • Fixed Vryko's vegvisir spawning + altar
  • Redone colliders for a lot of monsters
  • Fixed Prowler not giving riding skill
  • Fixed attack range for Asmodeus
  • Fixed raspberry bug for black bear taming/feeding
  • Fixed bugmeat+foxmeat bug for prowler taming/feeding
Click to view previous versions


  • Attempt at fixing Svalt's doorscript errors, feedback appreciated
  • Fixed fireball velocity and added a dead timer on Burning Hunger summons
  • Fixed Svalt not dropping his trophy
  • Reworked Frostmancer monster for Deep North with new attacks and health values
  • Nerfed Ice and fire drake health pools by 20%
  • Ancient shaman will now spawn root at it's target instead of random targetting


The devourer of dreams awaits his release!


  • Added new mini-boss to the Black forest biome, meet the banished monstrosity: Svält -> BIG shoutout to Azumatt for helping me out with the boss fight location!
  • Added a new greydwarf shaman variant that guards the sealed tomb of Svält
  • Fixed Lava golem's nova attack
  • Altered some visual effects on monster attacks
  • Added new status effects to Scorpid attacks
  • Added new status effects to Scorched pincer attacks
  • Changed Leatherscraps drop from Razorbacks to always be minimal 2
  • Fixed LOD on Bears
  • Bears can now swim normal instead of submerging like submarines
  • Increased drop rates for current mini-bosses to drop weapons from 2-6% to 8-10% to make it more rewarding to summon and kill em
  • Added vegvisir pin script to Monstrum's altar locations
  • Increased spawn altitude for Vrykolathas altar and vegvisir in an attempt to prevent them from spawning under water


Hot fix patch

  • Fixed game crashing when loading with Polish localization


Hot fix patch

  • Fixed Upgrade world location generation to now only generate Monstrum locations


The harbinger of the underworld awaits your challenge!


Be sure to re-use instructions for adding locations to your world to fully enjoy them on your existing world!

  • Added new mini-boss to the Swamp biome, meet Hel's champion: Vrykolathas
  • Added new Wraith enemy that only spawns at the altar of Vrykolathas at night
  • Added new frozen mammoth bones location to the Deep North with Fenring spawns
  • Added Primal fenris hair bundle to Deep North Fenrings droptable
  • Ballista trophy target now works thanks to Coemt! <3
  • Fixed Fox chase distance
  • Buffed Sythrak damage slightly
  • Buffed Frostmancer health pool slightly
  • Ice stalker serpents will now bite off chunks of terrain with their melee attacks
  • Fixed vegvisir not working bug
  • Fixed idle animation timers to have less noisy animals (Bears,Prowlers,Pridetusk)


  • Added new flamehole location to the Ashlands with imp spawns, use the instructions for adding locations to add these new fireholes to your existing world


  • Update fix for new Valheim patch
  • Fixed monster resistances, Majestic added em to the wiki
  • Fixed end game food bug that prevented you from refreshing the food when the icon starts flashing, thanks Azumatt <3!

Don't worry. I'm still around to keep my mods updated should the latest patch break them!


  • Removed premium paywall
  • Overhauled Jotunn berserker completely
  • Fixed Mammoth taming FX
  • Fixed all tameable breedings bugs
  • Added Asmodeus vegvisirs
  • Fixed Asmodeus hitbox and chase distance
  • Fixed Crawler hitbox
  • Fixed Dimetrodon flamebreath animation
  • Fixed some broken localization
  • Added Warfare locations to Monstrum

Due to personal life situations I have decided to step away from Valheim modding for now and remove paywall for my content and share my work with everyone.

I do plan to comeback and continue development on my mods on a more chilled pace at some point. When that is I don't know yet.

I'd like to thank all my supporters and friends who've made it possible for me to develop my mods to the state they're in, I couldn't have done this without you!


Final hot fix patch for real now :') !

  • Fixed creature scaling so you can still mount them with CLLC extra stars!
  • Fixed idle roar animation for Prowlers


Small hot fix patch!

  • Fixed Arctic wolves ragdoll bug
  • Fixed Asmodeus loot tables
  • Fixed Topaz and Sapphire level loot multipliers


  • The long awaited Thunderstore RELEASE!
  • New mounts! You can now craft saddles and mount Razorbacks, Bears, Prowlers and Pridetusk mammoths!
  • New mini-boss Asmodeus for the Meadows biome has arrived! Be sure to add his new altar location to your world with the upgrade world instructions!
  • Added the Crawler to the Swamp biome
  • Added the Prowler to the Plains biome, these can be tamed and bred
  • Added new foods to fill the stamina and eitr gaps for end game
  • Pridetusk mammoth can now be tamed but they can't be bred yet (work in progress)..
  • Remade Terroxadus from scratch, animations were terrible
  • Increased Fox spawn rate slightly
  • Reduced Obsidian golem spawn rate slightly
  • Fixed all bear movement
  • Fixed ice drake colliders
  • Fixed mammoth movement animation slightly
  • Fixed some loot drop rates for end game
  • Fixed some old trophies
  • Fixed vegetation spawning in locations
  • Fixed all breeding and taming timers

More to come soon after the break, stay tuned!

Available versions

Please note that the install buttons only work if you have compatible client software installed, such as the Thunderstore Mod Manager. Otherwise use the zip download links instead.

Upload date Version number Downloads Download link  
2023-9-17 1.2.2 6101 Version 1.2.2 Install
2023-9-4 1.2.1 7630 Version 1.2.1 Install
2023-9-3 1.2.0 1088 Version 1.2.0 Install
2023-9-2 1.1.9 2551 Version 1.1.9 Install
2023-8-22 1.1.8 6083 Version 1.1.8 Install
2023-8-4 1.1.7 6299 Version 1.1.7 Install
2023-7-29 1.1.6 3287 Version 1.1.6 Install
2023-7-9 1.1.5 6817 Version 1.1.5 Install
2023-7-5 1.1.4 3081 Version 1.1.4 Install
2023-7-3 1.1.3 1778 Version 1.1.3 Install
2023-6-14 1.1.2 5935 Version 1.1.2 Install
2023-6-12 1.1.1 1500 Version 1.1.1 Install
2023-5-30 1.1.0 4811 Version 1.1.0 Install
2023-5-2 1.0.9 3683 Version 1.0.9 Install
2023-5-2 1.0.8 481 Version 1.0.8 Install
2023-5-1 1.0.7 410 Version 1.0.7 Install