Bosses

The Forsaken are the major bosses of Valheim. You summon each one deliberately at its own altar with a specific offering. Defeating a boss unlocks the next material tier and drops a unique trophy. Every boss before Kall Fimbulbringer also grants a permanent Forsaken power that you can activate for five minutes at a time.

Bosses Conclude The Chapter

Bosses are not random encounters. You find the altar (usually marked by a Vegvisir), gather the required offering and place it to start the fight. The boss stays until it is killed. It does not despawn, and you can summon it again later if you bring another offering.

Each boss drops a unique trophy. Take that trophy to the Sacrificial Stones at the centre of the world and hang it on the matching stone. Once the trophy is mounted, the matching Forsaken power becomes available. You can only have one power active at a time, and to switch you have to return to the stones and select a different trophy.

Forsaken powers last five minutes and share a 20-minute cooldown. When you activate a power, nearby players get the effect too.

The Forsaken Powers

Eikthyr: 60 % less stamina used for running, jumping and swimming. The classic exploration power.
The Elder: +60 % chop and pickaxe damage and +30 % health regeneration. Excellent for wood and ore runs.
Bonemass: slight resistance to blunt, slash and pierce, free blocking, and stamina returned on block. The strongest defensive power for melee fights.
Moder: a constant tailwind while sailing, +300 carry weight, +10 % movement speed and frost resistance. The travel and hauling power.
Yagluth: +10 % to all damage, lightning resistance and a farming skill bonus. The offensive power.
The Queen: +100 % eitr regeneration, free sneaking and poison resistance. Essential for magic builds.
Fader: +100 % adrenaline gain, reduced stagger and fire resistance. The late-game combat power.
Kall Fimbulbringer (Deep North): the final boss. He does not grant a standard Forsaken power the way the others do.

Progression and Key Drops

Each boss also drops the item that opens the next stage of the game:

Eikthyr → Hard Antlers (Antler Pickaxe)
The Elder → Swamp Key (Sunken Crypts / iron)
Bonemass → Wishbone (finds buried silver)
Moder → Dragon Tears (Artisan Table)
Yagluth → Torn Spirits (helps with Mistlands progression)
The Queen → access toward the Ashlands
Fader → Embers from the eternal pyre, which open the Deep North
Kall Fimbulbringer → the Crown Jewel for the Crown of Valheim, and Sacrificial Blood, which ends the game

Killing a boss also raises world difficulty and can change what spawns in biomes you have already visited.

Notes

Bosses are immune to stagger, so you cannot stunlock them with a shield.
You must hang the trophy at the Sacrificial Stones to unlock the power; leaving it in a chest does nothing.
Altars are found, not built. Vegvisirs in dungeons and ruins mark their locations on your map.
You can fight a boss as many times as you want, as long as you bring a fresh offering.
Only one Forsaken power can be active at a time.

All Creature Categories

All Bosses

Name	Biome	Health	Summoned With	Power	Drops	Spawn ID
Eikthyr	Meadows	500	Deer trophy x2	Eikthyr's power	Eikthyr trophy, Hard antler x3, Eikthyr Power	`spawn Eikthyr`
The Elder	Black Forest	2500	Ancient seed x3	The Elder's power	The Elder trophy, Swamp key, The Elder Power	`spawn gd_king`
Bonemass	Swamp	5000	Withered bone x10	Bonemass's power	Bonemass trophy, Wishbone, Bonemass Power	`spawn Bonemass`
Moder	Mountain	7500	Dragon egg x3	Moder's power	Dragon tear, Moder trophy, Moder Power	`spawn Dragon`
Yagluth	Plains	10, 000	Fuling totem x5	Yagluth's power	Yagluth trophy, Torn spirit, Yagluth Power	`spawn GoblinKing`
The Queen	Mistlands	12, 500	None the first time. After that, 3 seeker soldier trophies on the hive seat	The Queen's power	Majestic carapace, The Queen trophy, The Queen's Power	`spawn SeekerQueen`
Fader	Ashlands	25000	3 Bells, each made from three bell fragments	Fader's power	Fader relic, Fader trophy	`spawn Fader`
Kall Fimbulbringer	Deep North	47000	3 malicious blood, offered in the prison	-	Sacrificial blood, Crown jewel	`spawn FrozenKing`

All Boss & Altar Items

Name	Weight	Stack	Teleport	Location	Crafting Materials	Spawn ID
Ancient Seed	1	50	Yes	Greydwarf brute Greydwarf nest	-	`spawn AncientSeed`
Bell	0.5	9	Yes	Black forge	3x Bell fragment	`spawn Bell`
Crown Jewel	2	5	Yes	Kall Fimbulbringer	-	`spawn CrownJewel`
Dragon Egg	200	1	No	Drake nest	-	`spawn DragonEgg`
Dragon Tear	1	50	Yes	Moder	-	`spawn DragonTear`
Fader Relic	1	9	-	Fader	-	`spawn FaderDrop`
Fuling Totem	1	30	Yes	Fuling Village Fuling Berserker	-	`spawn GoblinTotem`
Memorial Coal	2	50	Yes	Mörkhalla	-	`spawn MemorialCoal`
Sacrificial Blood	1	30	Yes	Kall Fimbulbringer	-	`spawn FrozenKingDrop`
Sealbreaker Fragment	0.5	9	Yes	Infested Mines	-	`spawn DvergrKeyFragment`
Sealbreaker	0.5	1	Yes	Galdr table	9x Sealbreaker fragment	`spawn DvergrKey`