
Coated Blades
Potion effect tipped/coated weapons that inflict effects on players and mobs.
Screenshots

About this Mod

Coat your swords and axes with potions to inflict effects on your enemies. Here are some of the key aspects of the datapack:
- All default potions obtainable in survival mode are supported.
- When a potion is applied to your weapon, the effect amplifier and duration will be based on the potion's tipped arrow.
- The amount of uses varies between effect types, with instant or 1 minute long potion coated swords only having 8 uses, while the other effects have 32 uses.
- You can remove a potion coat by applying a water, awkward, thick, or mundane potion to the weapon.
How to Coat a Weapon
In order to coat a weapon hold a potion in your offhand and a coatable item in your mainhand (axe or sword). Then, press your switch offhand button and the weapon will be coated.
Blacklist Effects
If you want certain potion effects to not be coatable onto blades, unzip the datapack and go to the following file path:
data>coatedbladesminecraft>item_modifier
In the item_modifer folder, you will see a .json file for every effect in the game and a blacklist folder. To blacklist an effect, simply drag the .json of the effect you want to blacklist into the blacklist folder.
Available Versions
How to Install Coated Blades on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set datapack Loader
In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.8).
Install Mod
Open the mod browser in the dashboard and search for "Coated Blades". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.8, 1.21.7, 1.21.6 (+1 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Coated Blades server crashes on startup – what to do?
Most common cause: wrong datapack version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.8). You can switch loaders with one click in the panel.
Is Coated Blades compatible with datapack and fabric and forge and neoforge and quilt?
Coated Blades officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 1.21.8, 1.21.7, 1.21.6. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Coated Blades – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Coated Blades consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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