Demon King (also called Anos) is one of the strongest melee fighting styles in Sailor Piece, built around raw damage output and powerful late-game scaling. Getting it requires completing a prerequisite quest, farming a specific boss repeatedly, collecting several rare drop materials, owning a particular clan, and earning a pity-based title. The whole process takes place on and around Academy Island.
Quick answer: Complete the Demonite Core quest on Academy Island, farm Calamity Seals from NPCs on Shinjinku Island, use those seals to summon and defeat the Demon King boss until you have all required drops and the Demon King title, equip the Voldegoat Clan, then talk to the Anos NPC at the back of Academy Island to unlock the fighting style.
Demon King Fighting Style — Material Requirements
| Material / Condition | Quantity | How to Obtain |
|---|---|---|
| Calamity Seals | 65 | Dropped by any NPC on Shinjinku Island |
| Demonic Fragments | 12 | Dropped by the Demon King boss |
| Demonic Shards | 6 | Dropped by the Demon King boss |
| Destruction Eyes | 2 | Dropped by the Demon King boss |
| Imperial Mark | 1 | Dropped by the Demon King boss |
| Voldegoat Clan | Must be equipped | Use clan rerolls until you land on Voldegoat |
| Demon King title | 1 | Pity reward from defeating the Demon King boss (115 pity counter) |
You need every single item and condition listed above before the Anos NPC will let you purchase the style. Missing even one — including having the Voldegoat Clan actively equipped — will block the transaction.
Complete the Demonite Core Quest
Before you can receive Calamity Seal drops or summon the Demon King boss, you must finish a short prerequisite quest on Academy Island.
Farm Calamity Seals on Shinjinku Island
With the quest finished, Calamity Seals will start dropping from any NPC you defeat on Shinjinku Island. The drop rate is moderate but not instant — expect to spend at least an hour of continuous farming to accumulate a meaningful stack. You will need a minimum of 65 seals just for the purchase requirement, plus additional seals to repeatedly summon the Demon King boss for its exclusive drops.
AFK farming works well here. If you already have a strong AoE fighting style like Gilgamesh equipped, you can set up near a group of NPCs and let auto-attacks handle the grind. Plan on stockpiling well beyond 65 seals, since every boss summon costs seals, and you will need many kills to collect all the rare materials and hit the title pity counter.
Summon and Defeat the Demon King Boss
Equip Voldegoat Clan Before Purchasing
The Voldegoat Clan is a separate requirement that has nothing to do with boss farming. You obtain it through clan rerolls, which are random. There is no guaranteed way to land on Voldegoat quickly, so start rerolling early while you farm boss materials. You must have Voldegoat actively equipped — not just owned — when you talk to the Anos NPC to finalize the purchase.
Talk to the Anos NPC to Unlock Demon King
Demon King Moveset Overview
| Move | Type | Approximate Damage | Notes |
|---|---|---|---|
| M1 (basic attack) | Melee | ~1.2 billion per hit | Consistent single-target damage |
| Z | Multi-hit AoE | ~3.5 billion total | Long animation with multiple hit markers; grants invulnerability during use |
| X | Ranged beam | Lower (variable) | Launches you into the air, then fires a directional beam; also grants invulnerability |
| C | Short-range AoE + punch explosion | ~5–10 billion | Damage scales with stats; you take damage during the animation |
| V | Meteor summon | ~20 billion | Long charge-up with a cutscene; massive hitbox |
| F | Planet-scale AoE | ~51 billion | Highest single-move damage; ground-shaking animation with enormous range |
The Z and X moves both provide invulnerability frames, making them useful for avoiding incoming damage while dealing your own. The C move does not share this property, so be cautious when using it against hard-hitting bosses. The V and F moves are the real damage dealers, with F alone capable of exceeding 50 billion damage at high stats.
How Demon King Compares to Other Top Styles
Demon King sits comfortably among the best fighting styles in Sailor Piece. It excels at single-target boss damage, making it ideal for boss farming and high-difficulty encounters. Strongest in History currently holds the top spot for overall versatility thanks to wider AoE coverage, but Demon King’s raw burst damage — particularly from its V and F moves — makes it a strong contender for any player focused on maximizing damage per hit. If you already have Gilgamesh or Gojo and want a meaningful upgrade for late-game content, Demon King is one of the best options available.
Farming the full set of materials takes time, especially hitting the 115-kill pity threshold for the Demon King title. Focus exclusively on this style rather than splitting resources across multiple fighting style grinds, and you will have it equipped and maxed far sooner.
