Aetherium Forge

Ancient Dwemer forge beneath the Ruins of Bthalft where the Aetherium Crest can be turned into the Aetherial Crown, Shield or Staff.

The Aetherium Forge (Dawnguard) lies deep beneath the Ruins of Bthalft and opens only after the four Aetherium Shards have been joined into the Aetherium Crest. The Dwemer built it to shape Aetherium into magical artifacts, and according to Katria it is at least 4,000 years old – ancient even for the Dwarves. It is the grand finale of Lost to the Ages.

What you’ll find

  • Dwarven Spiders and Dwarven Spheres guarding the halls.
  • The Forgemaster, a unique Dwarven Centurion standing between you and the forge.
  • A lava-filled main hall with rock islands, side doors above the lava and a high-level chest hidden at the back of the lava on the left.
  • An Adept-locked chest half buried in the plaza (the only container that restocks every few days) and another behind the lowest waterfall.
  • Soul gems lying underwater near the entrance and the sealed gate.
  • A statue on the path to the resonators whose eyes are actual rubies you can pry out.
  • Two silver ore veins past the doorway to the right of the corridor to the main forge.

Quests

Lost to the Ages – after beating the Forgemaster, Katria realises the shards themselves are pure Aetherium, and you get to craft one of three artifacts:

  • Aetherial Crown – Aetherium Crest, 2 Dwarven Metal Ingots, 2 Gold Ingots, 2 Flawless Sapphires.
  • Aetherial Shield – Aetherium Crest, 4 Dwarven Metal Ingots, 2 Refined Malachite.
  • Aetherial Staff – Aetherium Crest, 2 Dwarven Metal Ingots, 1 Gold Ingot, 2 Ebony Ingots.

Tips

The lava hits hard: a 150-point burst of fire damage plus lingering burn, and touching it floods your vision with blinding yellow. To reach the chest at the back, use Become Ethereal to swim through, or hop the rock islands with Whirlwind Sprint – a Vampire Lord‘s bat form works too. The high side doors have no ledge, so the same ethereal trick is the way in. If the crown refuses to accept your Flawless Sapphires, check for an unfinished quest that has marked them as quest items.

Details checked against community wiki articles and the Skyrim/Dawnguard game files, summarised in our own words.

Characters found here

Quests that lead here

Dawnguard Quest
Help the ghost Katria recover four Aetherium Shards across Skyrim, unseal the lost Aetherium Forge and craft one unique Aetherial artifact.

Creatures you will meet

The Dwarven Centurion is the biggest Dwemer automaton in Skyrim. Where to find it, its steam attack and what loot it leaves behind.
Dwarven Sphere in Skyrim, Dawnguard and Dragonborn: Dwemer sentry automatons with blade and crossbow. Variants, stats, resistances and the Steadfast follower.
The Forgemaster in Skyrim Dawnguard: the fire-breathing Dwarven Centurion guarding the Aetherium Forge in Bthalft. Stats, weaknesses, tactics and loot.
Vampire Lord in Skyrim Dawnguard: how to get the winged form from Harkon or Serana, its two combat modes, perk tree, weaknesses and stage effects.

Weapons found here

Armor found here

Items found here

More places like this

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Sources checked: Elder Scrolls Fandom location articles (Dawnguard export 2026-10-13); Skyrim/Dawnguard game files