ModsJava
Deltapack Mod (26.3, 1.21.11) – Fight a Bullet Hell Boss and Freeze Mobs
Java mod listed for Minecraft 1.21–26.x. Downloads from the MC Java Mods app on Android.
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Deltapack Mod brings Deltarune content into Minecraft, from dark fountains and dark worlds to the Roaring Knight. It adds a knife, the Snowgrave spell, and the Shadow Mantle. This mod also turns its boss fight into a bullet hell battle that copies the turn-based combat of the original game.
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Features:
- The Knife: Craft a knife, then stab the ground to open a dark fountain. It turns nearby items into a Darkner.
- Snowgrave: Craft it and use the spell to freeze all nearby mobs to death.
- The Roaring Knight: A hard boss fight in bullet hell style. The boss attacks first, then you get a chance to attack back.
- The Shadow Mantle: Cuts damage from firework and magic attacks, which are the exact attacks the Roaring Knight uses.
- The Shadow Crystal: Drops from the Roaring Knight. Eat it to gain the boss’s abilities.
- Includes 3 recipes and 9 advancements to go with the new items and spells.
How to Use:
- Craft a knife.
- Stab the ground with the knife to open a dark fountain.
- Drop items near the fountain to turn them into a Darkner.
- Craft the Shadow Mantle to get ready for the Roaring Knight.
- Defeat the Roaring Knight to get the Shadow Crystal, then eat it to gain its abilities.
Screenshots:




Deltapack Mod Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 26.3, 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: 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.
File checked by MCModsHub
- Downloads as 538185.mcaddon
- Download size: 86 KB
- Download link checked 1 Nov 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.