About Just Boss Swords
From ModrinthJust a mod that lets you borrow the powers of the different boss
Have you ever wanted to use the different boss powers? If so Just Boss Sword is there!
Cosmic Sword (Warden)
You get the cosmic sword by being the first to pick up the dragon egg, but in this state the sword is incomplete. To unleash his full potential, you will need souls...
By killing a warden or a player, you increase the level of the sword by one.
- Lvl 0: Just a very good sword
- Lvl 1: Give you permanently the resistance II and strenght I effects when you hold it in any of your hands
- Lvl 2: When you right click, you do a sonic boom. It deals 5 hearts of damage no mather the armor and has a 1min30 cooldown.
_*the listed effects stacks_
Give command
Cosmic Sword:
/function jj_cosmic_sword:give/lv<swordLevel(0-2)>Highlights
From source dataGame versions
Supports 16 Minecraft versions, the newest being 26.3.
Loaders
Runs on Data pack, Fabric, Forge, NeoForge and Quilt.
Footprint
Rated a light load on a server.
Just Boss Swords on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Data pack, Fabric, Forge, NeoForge, Quilt
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.3.1+mod, released 2026-10-13
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Fabric | 1.21 to 26.3 (14 versions) | 26.3 |
| Forge | 1.21 to 26.3 (14 versions) | 26.3 |
| NeoForge | 1.21 to 26.3 (14 versions) | 26.3 |
| Quilt | 1.21 to 26.3 (14 versions) | 26.3 |
| Data pack | 1.21 to 26.3 (10 versions) | 26.3 |
From 7 recorded builds of Just Boss Swords.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 1.3.1+mod | 2026-10-13 | 1.21.9 to 26.3 (8 versions) | Fabric, Forge, NeoForge, Quilt |
| 1.3.1 | 2026-10-13 | 1.21.9 to 26.3 (8 versions) | Data pack |
| 1.3.0+mod | 2026-09-12 | 1.21.9 to 26.2 (7 versions) | Fabric, Forge, NeoForge, Quilt |
| 1.3.0 | 2026-09-12 | 1.21.9 to 26.2 (7 versions) | Data pack |
| v1.1.0+1.21.1+mod | 2025-06-22 | 1.21 to 1.21.1 (2 versions) | Fabric, Forge, NeoForge, Quilt |
| v1.1.0+1.21.1 | 2025-06-22 | 1.21 to 1.21.1 (2 versions) | Data pack |
Run Just Boss Swords on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogCreatures & NPCs
Adds or changes creatures, NPCs and how they behave.
Runs on your server
From source side supportModrinth lists Just Boss Swords as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- Data packFabricForgeNeoForgeQuilt
- Runs on
- Serverrequired on the server
- Game versions
- 26.3 and 15 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-13Open ↗
- ✓AuthorJujuCorp, as published on Modrinth
- ✓LicenseLicenseRef-All-Rights-ReservedFree
