A mystic weapon wielded by the legendary Immortal Knight. It brims with magical power. Passed down from one warrior to the next.

You can feel a subtle vibration in the blade — it resonates with a strange power. - Bogroot Demon (RPA-ADV6)

An exquisite red gem rests in its hilt. The stone itself gives off a special glow, almost as if it has power of its own.

The Immortal Blade is found in the King's Guard Camp in Bogroot Swamp.

Elsifor floats across the camp to a sword with a red metal hilt lodged firmly into a root stump. It is the sword of the Immortal Knight, a sacred treasure to Nalos and a fine blade, as well. - Bogroot Demon (RPA-ADV6)

You can attempt to help General Grik and his soldiers fight the ice wyrm on the site or move to claim the sword.

The Klynoks will allow you to purchase the blade from them, possibly at a discount if you are in good relations with them. You may also be able to trade for all the armaments of the Immortal Knight.