Undermagic II is a datapack that expands the progression of the game with unique new gear and challenging boss fights. Inspired heavily by the Calamity Mod, this pack is a re-imagining of the original from 2019 and is currently in an early release state.
- Raid the Demonic Keeps, new Nether structures housing fearsome Demons
- 5 unique weapons: swords, spears, bows, and projectile melee for a wide variety of playstyles
- New armor set with unique properties
- Obtain items through expanded progression, from diamond sidegrades to new vanilla boss drops and beyond
- An intense boss battle against Demon General Maxon; intended to be challenging but fair, configurable via the world difficulty
- Complete in-game guidance via the Demonomicon (obtain by entering the Nether for the first time, or use /trigger um2.demonomicon to read)
This is an early release. There is much more to come, including both new and returning content...
Join my Discord server for discussion and any support needs. I love to hear what you have to say!
This pack uses the Smithed Crafter library by rx, Nexus, and many others. You do not need a seperate download, it's included in the files. Thanks to them!
Most textures are by Ragno. Thanks to her for the wonderful work!
This pack wouldn't be possible without the unending support of CreeperMagnet_ (who designed the logo), rx, Nexus, Delta, the rest of the Smithed community, and all my friends who keep me going. A heartfelt thanks to all of them :)
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- 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: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
- Downloads as um2_dp_1_0_0.zip
- Download size: 240 KB
- Download link checked 29 Aug 2026 — working
These come from our own check of the pack file, not from the source page.