Forged for the Demon King Baran, this S-Rank blade passes to Sung Jinwoo as a battle drop and is later entrusted to his shadow knight Igris, before traveling across the years into the hands of Cha Hae-In.
The weapon is a long, pale sword split down its middle by a thick dark stripe, finished with a guard that arcs downward. Its coloring tracked its owner. In Baran's grip the blade ran light blue with a yellow guard and gray handle, whereas under Jinwoo both guard and handle turned black. Once Ashborn granted him the Black Heart, the blade itself drifted from blue toward a faint purple.
As a melee armament it lifts the wielder's attack by 350 points, ranking it just below Kamish's Wrath among the strongest pieces Jinwoo ever owned. A built-in property named Storm of White Flames conjures a small lightning tempest across a set radius and triggers on its own with every swing of the blade.
Baran carried it first. After his defeat the sword fell to Jinwoo, who eventually passed it to Igris to wield as that knight's primary weapon. Decades on, the longsword found a new owner in Cha Hae-In, who adopted it as her main weapon.

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The Demon King's Longsword is a powerful S-Rank melee weapon that lifts the wielder's attack by 350 points, ranking it just below Kamish's Wrath among the strongest pieces Sung Jinwoo ever owned.
Igris wields the Demon King's Longsword as his primary weapon. Sung Jinwoo claimed the blade as a drop after defeating Baran and later entrusted it to his shadow knight Igris.
Storm of White Flames is a built-in property of the Demon King's Longsword that conjures a small lightning tempest across a set radius. It triggers on its own with every swing of the blade.
The Demon King's Longsword was forged for the Demon King Baran, who carried it first. After his defeat the sword fell to Sung Jinwoo, who eventually passed it to Igris.
Decades on, the Demon King's Longsword found a new owner in Cha Hae-In, who adopted it as her main weapon.
Looking for more on Demon King's Longsword? The Solo Leveling Wiki on Fandom has a dedicated page with community notes.
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