Infinity Castle

⛩ Infinity Castle — 無限城

A cinematic Demon Slayer boss-rush datapack for 1–8 players.
Fight through Nakime's shifting castle, face the Upper Moons one by one, and hold Muzan Kibutsuji down until the sun rises.

Unofficial fan work. Story and characters: Demon Slayer: Kimetsu no Yaiba © Koyoharu Gotouge / Shueisha. Not affiliated with Shueisha, Aniplex or ufotable.

⚠ You need TWO files.

1. The datapack (green Download button) → your world's datapacks folder

2. [⬇ Download the Resource Pack](PASTE_LINK_HERE) → Options → Resource Packs

✦ What's inside

A full story, told in cutscenes

• 27 in-game cutscenes with a director camera. You can look around with your mouse while they play.
• It starts at the Ubuyashiki estate and ends on the streets of Tokyo at dawn.
• Any scene can be skipped.

Six arenas, six fights
Arena · Boss
Nakime's Biwa Hall · the eyes of the castle, while the rooms drift and rearrange themselves
Hall of Gold · Kaigaku, Upper Moon Six
Lotus Temple · Doma, Upper Moon Two
Compass Hall · Akaza, Upper Moon Three
Moon Ruin · Kokushibo, Upper Moon One
Flesh Hall, then Tokyo · Muzan Kibutsuji, until dawn

Fight like a Demon Slayer

• 13 Breathing styles, each with its own blade, haori and forms, plus a Final Form.
• Hashira allies fight beside you: Giyu, Rengoku, Mitsuri, Gyomei, Sanemi, Obanai, Muichiro, Zenitsu, Inosuke, Kanao and more.
• When a teammate goes down, a friend can crouch next to them to revive them. The team shares a pool of lives.
• Easy, Medium and Hard modes.

Demon's Hoard

• After each Upper Moon falls, a chest appears with 12 legendary relics.
• Daybreaker, Ragnarok, Voltaic Thunder Fang, Purgatory Firestorm and more each have their own particle ability.
• The chests also hold god apples and stranger things.

AKATSUKI

• Beat Muzan and the host receives a legendary, animated four-form blade that only demons can feel.

Built for servers

• An admin opens the castle, or hands out a Castle Pass that any player can use.
• Other players get a [REQUEST TO JOIN] button. The host or an admin can accept or deny each request.
• Players who arrive late join at the next room.
• Anyone can watch as a spectator.
• Disconnects are handled safely, and runs have a cooldown.
• There is a records board of the fastest clears, plus advancements.
• Your own inventory is stored safely and given back at the end. You fight with the castle kit.
• No server-wide side effects. It never changes the time, keepInventory or mobGriefing.

▶ How to play

1. Install.

• Put InfinityCastle.zip in your world's datapacks folder.
• Turn on InfinityCastle_Resources under Options → Resource Packs.
• Restart the world or server. The castle adds its own dimensions, so /reload is not enough.

1. Open the castle. Commands must be enabled.

• /function ic:admin/open makes you the host and opens it now.
• /function ic:admin/pass gives you a Castle Pass. Right-click it to open the castle.

1. Press [G] (Quick Actions) for the menu: join requests, difficulty, skipping, leaving, records.
2. The battle starts after 60 seconds, or straight away when the host clicks [START NOW].

Admin commands

Command · What it does
/function ic:admin/help · Lists all admin commands
/function ic:admin/skip · Skips the current fight
/function ic:admin/stop · Ends the run
/tag add ic_admin · Lets that player receive Accept / Deny buttons

⚙ Requirements

• Minecraft Java 1.21.10
• The InfinityCastle_Resources resource pack is required for skins, blades and the music. It is attached to every version as Required resource pack.
• Works in single player, LAN and dedicated servers (Vanilla, Paper, Purpur).

✦ Credits

• Datapack, arenas, boss fights, cutscenes and code: manu227_
• Story and characters: Demon Slayer: Kimetsu no Yaiba © Koyoharu Gotouge / Shueisha
• 3D nichirin blades and cosmetics: Demon Slayer Cosmetics by illusion Doge, used with permission
• Katana models: anime-packs.com, used with permission
• AKATSUKI and the castle music: made for this project