Ultris Boss Expansion Mod (1.20.1, 1.19.4) – New Unique Bosses
Java mod listed for Minecraft 1.19–1.20. File opened and checked on 16 Oct 2026; downloads from the MC Java Mods app on Android.
⬇ DownloadUltris Boss Expansion Mod expands Minecraft with 8 new exciting bosses to take on, each with their own quests and rewards. Explore multiple new boss structures, special items, and new foes for you to take on.
Unique boss patterns, boss music, stages, sounds and visuals all come together to create these awesome bosses, from bosses that can spawn early game, to bosses for the end game player.
Screenshots:
Command:
- /function 1_splatus:ultris/admin_menu
How to use:
- To summon the bosses, use /function 1_splatus:ultris/admin_menu and select the option “Summon Bosses”.
Mod Original Sound Track:
Ultris Boss Expansion Mod Download Links
For Minecraft 1.20.1, 1.20
Forge/Fabric/Quilt version: Download from Server 1 – Download from Server 2
For Minecraft 1.19.4
Forge/Fabric/Quilt version: Download from Server 1 – Download from Server 2
For Minecraft 1.19.3
Fabric version: Download from Server 1 – Download from Server 2
Forge/Fabric/Quilt version: Download from Server 1 – Download from Server 2
For Minecraft 1.19.2, 1.19.1, 1.19
Fabric version: Download from Server 2
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20.1, 1.19.4
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Downloads as 205161.mcaddon
- Download size: 14.0 MB
- Download link checked 30 Jul 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.