BossAdd
BossAdd adds new mechanics and phase patterns to all 7 Valheim bosses.
Every feature is fully configurable via BepInEx ConfigurationManager (F1 key).
Supports English and Korean — auto-detected from your Valheim language setting.
Features
Eikthyr
- Summon — Calls minions on HP thresholds, timer intervals, or both. Includes a special elite summon at low HP.
- Stomp Lightning — Stomp attacks trigger lightning strikes with a configurable safe zone radius.
- Fire Patch — Stomp impacts leave a burning fire field on the ground.
- Horn Attack — Horn charge launches players with configurable force.
- Phase Messages — Custom HUD messages at configurable HP thresholds.
The Elder
- Tree Spawn — Grows trees around players when below HP threshold.
- Rock Throw — Hurls boulders with configurable speed, arc, and splash damage on impact.
- Phase Messages — Custom HUD messages.
Bonemass
- Split Summon — Splits into 5 MiniBonemass variants at HP threshold.
- Kill Condition — Bonemass cannot die until all MiniBonemass are defeated. Wrong kill order heals Bonemass.
- Mini Stats — Customize MiniBonemass HP, damage, speed, attack range, and damage resistances independently.
- Throw Summon — Throw attacks have a chance to spawn additional minions.
- Phase Messages — Custom HUD messages.
Moder
- Frost Clones — Splits into MiniModer clones at HP threshold.
- Mini Stats — Customize MiniModer scale, HP, damage, speed, and flight behavior.
- Air Breath — Fires frost breath while airborne.
- Landing Blast — Knocks back nearby players on landing.
- Freeze Roar — AOE frost attack triggered below HP threshold.
- Ice Field — Creates a persistent frost damage zone.
Yagluth
- Skeleton Summon — Summons Skeleton Warriors at 3 HP thresholds. While any Skeleton lives, Yagluth takes no damage.
- Death Zone — Forces a nova slam at HP threshold. Drains % max HP from all nearby players. VFX and radius configurable.
- Meteor Fire Patch — Meteor impacts leave lasting fire fields.
- Rage Mode — Accumulated damage triggers a berserk state with speed and damage bonuses.
The Queen
- HP Summon — Spawns brood at configurable HP intervals.
- Timer Summon — Spawns brood on a repeating timer during combat.
- Breath Summon — Breath attacks trigger additional minion spawns.
- Poison Field — Creates persistent poison damage zones along her movement path.
Requirements
Installation
Install via r2modman or Thunderstore Mod Manager (recommended).
Manual install: extract to BepInEx/plugins/bossadd/.
Configuration
Open the F1 menu in-game to adjust all settings per boss.
All features can be individually enabled or disabled.
Config file: BepInEx/config/bossadd.cfg
Language Support
The F1 menu descriptions automatically display in English or Korean
based on your Valheim language setting (Main Menu → Settings → Language).
Bug Reports & Support
Found a bug? Please report it so it can be fixed!
Join the Discord server via the Support section on the CaptainSkillTree mod page.
Post your report in the appropriate channel — responses are active.
When reporting, please include:
- What happened and what you expected
- Your mod list (other mods installed)
- The BepInEx log file (
BepInEx/LogOutput.log)
