Quick answer

In Valheim, the first boss altar (Eikthyr’s Mystical Altar) is found by using the Deer Stone runestone at your spawn point , which marks the nearest Eikthyr altar on your map. From there, you travel to that marked location in the Meadows biome and interact with the altar to summon the boss.

Step-by-step: How to find the first spawning altar

1. Start at the sacrificial stones (spawn circle)

When you first wake up in Valheim, Hugin the crow drops you near a ring of sacrificial standing stones.

Walk up to the stone engraved with a deer head (Eikthyr’s symbol) and interact with it.

  • This runestone is often called a vegvisir.
  • Interacting with it adds a red skull icon to your map showing the nearest Eikthyr altar.

2. Follow the map marker to the Meadows

Open your map and look for the red boss icon that just appeared.

  • It will be in a Meadows biome (green grassy area with trees, deer, and boars).
  • The marker points to the closest Eikthyr altar for your current world seed.

Head toward that icon on foot or by raft, staying mostly in Meadows until you reach it.

3. Recognize the altar

The Eikthyr Mystical Altar looks like:

  • A large, circular stone platform with a deer-skull-like structure in the center.
  • Often surrounded by smaller stones and sometimes a lore stone nearby.
  • Unlike the starting sacrificial stones, this is the actual summoning altar.

When you get close enough, the altar will be clearly labeled as “Eikthyr” when you look at it.

4. Optional: If the first location is inconvenient

Each boss has multiple possible altar locations (usually 3–5 per boss).

If the marked altar is:

  • On a tiny island far away
  • Next to a dangerous biome edge
  • In a spot you don’t like

You can:

  • Explore in a different direction from spawn.
  • Find another Eikthyr vegvisir stone in other Meadows areas or small dungeons.
  • Interact with it to reveal a different, possibly closer altar location.

But for your first boss, the spawn stone almost always gives a usable location.

What you need once you find the altar

Reaching the altar is only half the job. To actually spawn Eikthyr:

  1. Hunt deer in the Meadows.
    • Use a bow or sneak up with a flint knife and stab from behind.
  1. Collect 2 Deer Trophies.
  2. Return to the altar.
  3. Place the 2 Deer Trophies into the altar’s offering slot.
    • This triggers the boss fight.

After defeating Eikthyr, take his trophy back to the original sacrificial stones at spawn and hang it on the deer stone to get your first boss power (reduced stamina cost for running and jumping).

Mini-FAQ from forum discussions

“Is the spawn circle the altar?”
No. The spawn circle with all the boss stones is just for revealing locations and hanging trophies. The actual fight happens at a separate altar out in the world.

“Can there be more than one Eikthyr altar?”
Yes. Each boss has several possible altars, but the vegvisir only marks the nearest one to where you found that runestone.

“What if I find an altar before seeing the vegvisir?”
If you stumble on an unmarked altar, there’s usually a lore stone next to it. Interact with that to add the boss location to your map even without the spawn vegvisir.

TL;DR

  • Go to the deer runestone at the spawn stones.
  • Let it mark the nearest Eikthyr altar on your map.
  • Travel to that Meadows location , find the circular stone altar.
  • Offer 2 Deer Trophies to summon and fight Eikthyr.

Information gathered from public forums or data available on the internet and portrayed here.