JujutsuCube

v0.0.2·Updated 2026-05-09

A Jujutsu Kaisen inspired ULTRAKILL weapon mod featuring Black Flash, Domain Expansion, Positive Energy, voice lines from very profeshnoal VAs, and mathematically questionable damage.

About this mod Author’s original text

JujutsuCube

A ShrineMod weapon for ULTRAKILL that adds the "Shrine" — a configurable cube weapon with fast slashes, charged piercing attacks, Domain Expansion, and a Positive Mode (Reverse Cursed Technique).

Table of Contents

  • Features
  • Controls
  • Modes
  • Configuration
  • Installation
  • Contributing
  • License

Features

  • Rapid-fire primary slashes (hitscan) and charged secondary piercing slash with AoE explosion.
  • Two distinct modes: Normal Mode (style mechanics, Black Flash) and Positive Mode (high damage + healing).
  • Domain Expansion: deploy a persistent damaging sphere that follows you.
  • Black Flash mechanic: heavy damage multipliers, hitstop, and chain attacks.
  • Fully configurable via BepInEx config file.

Controls

  • Equip: Weapon Slot 5 or press 7
  • Toggle Positive Mode: Y (configurable)
  • Primary Attack: Left click — rapid slashes
  • Secondary Attack: Hold Right Click to charge, release to fire piercing slash + AoE
  • Switch slash shape: Mouse Wheel (Normal Mode)
  • Domain Expansion: Hold Middle Mouse to charge, release to deploy
  • Reverse Cursed Technique (Positive Mode): Middle Mouse Click

Modes

Normal Mode

  • Primary: rapid hitscan slashes (Damage: 4–6 per hit)
  • Secondary (charged): piercing wide slash that spawns a multi-hit AoE on impact (Damage: ~170 per hit ×7)
  • Slash shapes: Thin & Long (vertical) and Thin & Wide (horizontal)
  • Black Flash: small chance to trigger huge damage (×2.5), hitstop and style bonuses; chains between 1–36 extra attacks

Positive Mode

  • The cube turns yellow; Black Flash is disabled.
  • Damage multiplier (default ×16) and healing on hit (Primary/Secondary configurable).
  • Rapid-fire slashes when scrolling the wheel (alternative to switching shapes).
  • Reverse Cursed Technique (RCT): in Positive Mode, Middle Mouse instantly heals to 200 HP and spawns a yellow sphere that halves enemies' health periodically while active.

Domain Expansion

  • Hold Middle Mouse to charge a Domain; release to deploy a black sphere that follows you.
  • Enemies inside take continuous primary and secondary damage; domain duration and radius are configurable.
  • Domain ticks have a configurable chance to trigger a Black Flash.

Configuration

After running the game once, edit the config at BepInEx/config/com.yourname.jujutsucube.cfg.

Example (values shown are defaults used by the mod):

[General]

WeaponSlot = 5

UseOldCube = false

PositiveModeKey = Y

[BlackFlash]

BaseChance = 5.0

ChainModifierChance = 10.0

[Domain]

MinHoldTime = 10.0

DurationMultiplier = 1.5

Radius = 8.0

[PositiveMode]

DamageMultiplier = 16.0

PrimaryHeal = 5

SecondaryHeal = 20

Installation

  • Install BepInEx in your ULTRAKILL directory.
  • Build the project with dotnet build -c Release or download the pre-built JujutsuCube.dll.
  • Copy JujutsuCube.dll to ULTRAKILL/BepInEx/plugins.
  • Launch the game and equip the Shrine via Slot 5 or by pressing 7.

Contributing

Contributions, bug reports and feature requests are welcome. Open an issue or a pull request with details and steps to reproduce.

Credits

  • Original mod and configuration by the mod author(s).
  • Inspired by the Jujutsu mechanics and ULTRAKILL community mods.

License

This project is released under the MIT License. See the LICENSE file for details.

Install & use Install: BepInEx plugin

  1. The archive from playbuff is the mod itself — usually a BepInEx plugin (a .dll or a plugin folder once unzipped).
  2. Recommended: use a community mod manager (such as r2modman) — pick this game, import the mod, and the manager sets up BepInEx and its dependencies for you.
  3. Manual route: install the BepInEx loader in the game folder, then drop the unzipped .dll or plugin folder into BepInEx/plugins/.
  4. Launch the game — the BepInEx console logs every plugin it loads; seeing this mod in the log means it is installed.

Mods with listed dependencies need those installed too, or they will not load. Options are usually changed in-game or in the plugin's config file.

Dependencies

Install these first, or the mod will not work:

BepInEx-BepInExPack

File & checksum

Filename
JujutsuCube-0.0.2.zip
File size
974.0 KiB