How to Get Adamantine Longsword in Baldur’s Gate 3?

You can craft the Rare Adamantine Longsword weapon at the Adamantine Forge in the Underdark region of Baldur’s Gate 3.

Craft the weapon at the Adamantine Forge (Source: Larian Studios)
Craft the weapon at the Adamantine Forge (Source: Larian Studios)

One of the cornerstones of any RPG is a constant sense of progression as you move through the game. You achieve this by upgrading weapons and gear and becoming stronger. The Adamantine weapons in Baldur’s Gate 3 do exactly that, allowing you to feel an unprecedented sense of progress.

The Adamantine weapons are extremely strong and come with bonus traits that make cutting through enemies a breeze. There are three Adamantine weapons in the game: the Adamantine Longsword, the Adamantine Mace, and the Adamantine Scimitar. Each of these weapons has unique traits that make them best suited against certain types of enemies. 

In this guide, we shall go over the Adamantine Longsword and its features. We will also cover the steps needed to acquire this weapon and give a brief overview of its uses. 

What is Adamantine Longsword in Baldur’s Gate 3? 

The Adamantine Longsword is a Longsword forged with a +1 weapon enchantment. This weapon is not found anywhere in the world and can only be crafted at the Adamantine Forge under the Grymforge. The Adamantine Longsword falls under the longsword category and is ideal against enemies resistant to slashing damage. 

“Though heavy, this longsword swings effortlessly in your hand — ready to take down a hundred enemies,” is the Adamantine Longsword weapon description. 

Features of Adamantine Longsword in Baldur’s Gate 3 

The Adamantine Longsword is a Rare (blue) longsword that can be wielded either one-handed or two-handed with different modifiers. The weapon also comes with a +1 weapon enchantment after being crafted. The weapon grants two effects to its user: 

  • Diamondsbane: The Adamantine Longsword automatically critical hits an object.
  • Lethal Weapon: The weapon also ignores slashing damage resistance.

As you raise your proficiency with this longsword, you will get access to three weapon actions. The first is the Pommel Strike, a hard-hitting strike that deals non-lethal damage with a chance to daze the enemy. The second action is Lacerate. This action inflicts the Bleed status by targeting weak spots. The last action is the Rush Attack. This is a charged attack that deals high damage and can throw the enemy off-balance. 

The Longsword mould (Source: Larian Studios)
The Longsword Mould (Source: Larian Studios)

Steps to Get Adamantine Longsword in BG3

Much like every other Adamantine weapon, the Adamantine Longsword has to be crafted at the Adamantine Forge by using Mithral ores and a Longsword Mould. Acquire these two items and head to the forge to craft the Rare weapon. Take note that there are only two Mithral ores in the game, so you have very limited choice in terms of Adamantium equipment you choose to craft. 

Get the Longsword Mould 

Finding the Longsword Mould can be a little tricky. To get this mould, spawn in at the Grymforge waypoint in the Underdark and then head up the staircase on your right. Stick to the left and go up the second set of stairs. There you will see a golden altar with a pit ahead of it. Parkour across the gaps, past the cliff till you reach a broken catwalk. Ahead of the catwalk is a hanging bridge. Jump on it to find the Longsword Mould. 

Get the Mithral Ores

You can Mihtral ores from Mithral veins. There are only two such ores in the game and both can be found in the Underdark. The first Mithral Vein is southeast of the Ancient Forge waypoint in Grymforge down a flight of stairs. This path will diverge to the left towards broken stairs. Follow the path and then parkour past the gaps to reach the first Mithral Vein. 

As or the second Mithral Vein, head right from the Ancient Forge waypoint and follow the path along the edge of the cliff. Parkour past the gaps and you will reach the second Mithral Vein. Use bludgeoning weapons to inflict damage on the Mithral Veins and mine the ores. 

What is the Use of Adamantine Longsword? 

The Adamantine Longsword allows you to deal damage to enemies resistant to slash damage. This list of enemies incudes Balthazar, Apostle of Myrkul, Gilded Imp, Greaseball, Grym and many more. The weapon will let you deal with these enemies with ease. 


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