Spell Engine Use Key Fix

Spell Engine Use Key Fix is a lightweight compatibility addon for Spell Engine on Minecraft 1.20.1 Fabric that moves Spell Engine's special Use Key action from the vanilla right mouse button to a configurable Minecraft keybind.

This allows the right mouse button to remain available for item and weapon abilities, such as the unique abilities of Simply Swords weapons.

Features

• Configurable Use Key — Moves Spell Engine's special Use Key action to a configurable keybind available directly in Minecraft's Controls menu.
• Right Mouse Button Fix — Frees the vanilla right mouse button for normal item interactions and weapon abilities.
• Modifier Key Support — Supports key combinations such as Alt + R, Ctrl + R, and Shift + R when Modern KeyBinding is installed.
• Simply Swords Compatibility — Prevents Spell Engine's item cooldown lock from incorrectly blocking Simply Swords weapon abilities.
• Independent Cooldowns — Spell Engine spell cooldowns and Simply Swords weapon ability cooldowns can operate independently.
• HUD Key Display — The Spell Engine HUD displays the configured key instead of always showing the vanilla right mouse button.
• Lightweight — Only modifies the Spell Engine Use Key and the related cooldown interaction without replacing Spell Engine or Simply Swords.

How It Works

Spell Engine normally uses Minecraft's vanilla Use Key, which is bound to the right mouse button, as a special input for spell casting.

This can conflict with weapons that also use the right mouse button for their own abilities.

Spell Engine Use Key Fix redirects that special action to a separate configurable keybind while leaving the vanilla right mouse button available for normal item usage and weapon abilities.

When Simply Swords weapons are used as spell-hosting items, the addon also prevents Spell Engine's item cooldown lock from applying the spell cooldown directly to the weapon. This keeps the weapon's own ability cooldown separate from the Spell Engine spell cooldown.

Compatibility

Minecraft: 1.20.1
Loader: Fabric
Spell Engine: 1.10.7+
Simply Swords: 1.56.0+
Fabric API: 0.92.12+
Modern KeyBinding: 1.2.1+ (Optional)

This addon is designed for Spell Engine 1.10.7 on Minecraft 1.20.1 and may require updates for other Minecraft or Spell Engine versions.

Installation

Install Spell Engine Use Key Fix alongside Spell Engine.

After launching Minecraft, open:

Options → Controls → Key Binds

Find:

Spell Engine: Use Key

Assign it to any available key or mouse button.

When Modern KeyBinding is installed, modifier combinations such as Alt + R, Ctrl + R, and Shift + R can also be used.

No additional configuration is required.

Credits

Created by zClashTM.

Thanks to the Spell Engine and Simply Swords projects for their original mods and implementations.

This project is an independent compatibility addon and is not affiliated with or officially endorsed by Spell Engine or Simply Swords.

License

Spell Engine Use Key Fix is licensed under the GNU General Public License v3.0 (GPL-3.0).