Getting your hands on a Rogue Piece Demonite Fragment is actually the easy part. What you’re left with is the weight of endless dungeon grinding and deciding how to invest the fragments to improve your build and gameplay.
Fortunately, my guide gives you the full spread of a Demonite Fragment’s versatility, so you can choose how to use it after you’ve gotten your hands on one, or plenty…
Before I yap about the important stuff, thanks for checking out my 100% AI-Free article. It means so much that readers like you appreciate human-made content.
Rogue Piece Demonite Fragment Obtainment
Demonite Fragments have a 20% drop chance from the Asta, Half Demon Form Boss.
Of this boss’s drops, the Demonite Fragment fortunately has the highest pull rate, making it a forgivable material to farm.
Asta, Half-Demon Form
To fight Asta, you need to reach the 10th and final wave of the Anti-Magic Dungeon, where this boss will appear, with his staggering 35,000,000 HP.
Getting into the Anti-Magic Dungeon requires 10x Dungeon Tickets (Chest Drop and Exchange) and 5,000 Gems to summon.
Demonite Fragment Uses
The Demonite Fragment has two primary uses, with its initial gimmick being a method to unlock a race that you can’t otherwise obtain via rolls.
Half-Demon Race
When consuming Demonite Fragments, there’s a slim chance you’ll abandon your roots and become a Half-Demon. This lineage comes with some buffs, as well as a cool cosmetic where half of your avatar strikes a resemblance to… I’m sure you can guess.
As for buffs, Half-demons enjoy:
- Reduced DMG taken from Power Stats.
- Increased Sword DMG.
- -30% Max HP.
Black Clover UPD
As of the Black Clover UPD (Feb 2026), the Demonite Fragment also appears as a necessary material needed for the new Yami Katana weapon.
All materials needed for Yami Katana include:
- 25,000 Gems
- 1x Darkness Katana
- 1.25% drop chance from Yami, Lord of Destruction Boss.
- 1x Darkness Grimoire
- 0.5% drop chance from Yami, Lord of Destruction Boss.
- 25x Demonite Fragments
- 20% drop from Asta, Half Demon Form Boss.
- Darkness Magician (Title) – Removed on obtainment of the Katana.
- 5.4% drop chance from Yami, Lord of Destruction Boss.
To encounter Yami, head to the brand new Hage Island and speak with the Yami Spawner. It conjures him. You will need 1x Demonite Fragment.
Frequently Asked Questions
- Q: Should I go for the Yami Katana or the Half-Demon Race?
- A: Both are good! The Yami Katana is brand new, so it has some novelty for this update. Whereas the Half-demon Race offers a buff that improves the quality of the Katana (Increased Sword DMG), as well as any other weapon you may prefer to use.
- Q: Is the Demonite Fragment grind worth it?
- A: That depends on how invested you are in the latest weapon. You need at LEAST 26x Demonite Fragments just to have enough for the material cost as well as summoning the boss once (assuming you get all drops in one go, which is very unlikely). But the truth is, you’re likely going to need to grind the Anti-Magic Dungeon hundreds of times to get what you need to create the Yami Katana.
