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Adamantine Longsword
Adamantine Longsword
Rare
1d8+1 Slashing
Diamondsbane: If an adamantine weapon hits an object, the hit is always critical.
Lethal Weapon: This weapon ignores Resistance to Slashing damage.
Weapon Enchantment +1
Proficiency with this weapon type unlocks:
Though heavy, this longsword swings effortlessly in your hand - ready to take down a hundred enemies.Longswords Versatile
Location - Adamantine Longsword
Can be forged in 
Adamantite Forge. Requires Mithral Ore (1, 2) and Longsword Mould.
- When you have all the required items, go to the Adamantite Forge, insert the mould into the Mould Chamber and the ore into the Crucible.
- Lower the platform by using the Forge Lever and then use the Lava Valve. If you have not yet defeated Grym (Lv. 10), this is when the encounter begins.
- After the area is submerged with lava, use the Forge Lever, and the item will be crafted.
Discussion
Gale can absorb the Magic from this Item. If Gale consumes it, it vanishes forever. That is irreversible and unavoidable. But don't be silly!
(There is better food for Gale: Ring of Color Spray, Frayed Drow Hood, Sunwalkers Gift, Everseeing Eye Necklace, Exterminators Axe; Hunting Shortbow, Kormira's Locket, Spiderstep Boots.)