Effect on Vanilla Bosses

Effect on Vanilla Bosses

BiomeLords doesn't just add new fights — it also reaches back into Valheim's own boss fights, but only after you've started defeating Lords.

Before you defeat any Lord

Eikthyr, the Elder, Bonemass, Moder, Yagluth, the Seeker Queen, and the Ashlands boss all fight exactly like vanilla Valheim. Nothing changes until you claim your first Lord kill.

After you defeat a Lord

Once you've defeated at least one Lord, every vanilla boss you summon afterward gets stronger to match the highest-tier Lord you've beaten so far — in the same way a Lord's own health scales with your progress (see How Difficulty Scales):

• Their health pool rises to match that tier.
• Their damage rises by the same proportion, while keeping their own signature attack types (Eikthyr still gores and uses lightning, Bonemass still poisons, and so on — only the numbers go up).

This only ever scales a vanilla boss upward. If the boss's natural difficulty is already higher than your best Lord kill (for example, fighting Yagluth before you've beaten any high-tier Lord), nothing changes — vanilla bosses are never made weaker than normal.

Why this matters

In practice, this keeps early vanilla bosses relevant even if you go back to fight them later, or if your server's progression order doesn't match the "intended" Eikthyr → Ashlands path. It also means a server that's been actively hunting Lords will find its remaining vanilla boss fights noticeably harder than a fresh, Lord-free world — something to keep in mind if you're planning a boss-rush playthrough or onboarding new players to an established server.