How to get Demon King’s Longsword in Rogue Piece?

Here’s the guide to getting the Demon King’s Longsword in Rogue Piece and how to unlock all of its skills.

How to get Demon King's Longsword in Rogue Piece

Rogue Piece Demon King’s Longsword

Demon King’s Longsword was added on February 15th, 2026. It’s an exotic rarity weapon, available for a limited period of time. To use all its skills, you will need to obtain Book of Throne Keeper (5).

Rogue Piece Demon King's Longsword

Below, I have shared the complete guide to obtaining Demon King’s Longsword, along with Book of Throne Keeper:

Demon King’s Longsword – How To Obtain It?

You can obtain the Demon King’s Longsword by defeating the Igris, Red Commander Boss. The drop rate is extremely low (0.4%) – so get ready to grind.

Rogue Piece Demon King's Longsword Igris

Here’s some info on Igris, Red Commander Boss:

  • Spawns in Red-Commander Dungeon
  • Requires 25 Dungeon Tickets and 7500 Gems to summon
  • Igris spawns in wave 5 of the Red-Commander Dungeon
    • Health: 70,000,000
    • Drops:
      • Demon King’s Sword 0.4% [Material]
      • Crimson Heart 0.4%
      • Demon King’s Armor (ACC) 2%
      • Red Commander (Title) 2%
      • Book of Throne Keeper 4%

Consume/use the Demon King’s Sword materials to get the Longsword [x10]. 

Demon King's Sword

Book of Throne Keeper

You need 5 Book of Throne Keeper to use all the skills of the Demon King’s Longsword [x750]. You can obtain this book from the Red Commander Dungeon. Go through each wave, and at wave 5, you will encounter Igris, who drops this item.

Book of Throne Keeper

Compared to other swords, the Demon King’s Longsword, as the name suggests, is quite long and formidable and offers a wide range of attack abilities, from normal slashes to heavy slashes, stand and slash, dash and slash, and more.

That’s it for now in this post on how to get Demon King’s Longsword in Rogue Piece.

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