Thorm's Bosses
by Thorm
Thorm's Bosses adds eight custom boss encounters, mini-bosses, new mobs and three new dimensions to the End, for the Forge loader on 1.20.1.
What it does
Players reach the new realms by travelling far beyond the End void, where each of the three added dimensions has its own cave-style terrain, generated structures and atmospheric biomes. Along the way players gather alien materials that can be crafted into armor sets, and the eight animated bosses wait at the most hidden rewards in the mod, each guarding an exclusive reward.
The mod fits players who want a progression path beyond vanilla endgame content, and server owners who run dungeon-style packs. Thorm's Bosses requires Geckolib, which must be installed alongside it. Either side can run the mod, and neither needs it, so it can be added to a client alone, a server alone or both. Files are published for Forge on 1.20.1 only, with 1.6.5 as the latest file, released 2026-10-06. The mod is all rights reserved and not open source.
Key features
Eight legendary bosses
Eight distinct custom bosses and mini-bosses guard the hidden rewards, each with its own animated encounter.
RPG resource progression
New ores and an endgame netherite-tier armor set, along with custom weapons, form a resource ladder that climbs with each boss defeated.
Mimic Cube and Mimic Guard
A terrifyingly fast slime variant copies the last attack it received, and a tougher guard variant fires a projectile that deals damage, knockback and Levitation.
Giant variants
Both the Mimic Cube and the Mimic Guard have colossal boss versions that split into four smaller aggressive copies on defeat.
Balanced combat
The Mimic Guard fires only along the X and Z axes, which prevents the infinite levitation loops found in other guards.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
How it compares
Progressive Bosses is also a Forge 1.20.1 mod with client and server environment, but it is all rights reserved and not open source. Universe3090 Mod is another Forge 1.20.1 option, also client and server and all rights reserved. Endless Deep Space covers the same space theme under a Creative Commons Attribution Non Commercial 4.0 license, with no open-source status. Thorm's Bosses works on either side, and neither needs it, which sets it apart from these in how the environment is set.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Thorm's Bosses | Forge | 1.20.1 | Client or server, optional | 2026-10-06 |
| Progressive Bosses | Forge | 1.20.1 | Client and server | 2026-07-26 |
| Universe3090 Mod | Forge | 1.20.1 | Client and server | 2026-08-23 |
| Endless Deep Space | Forge | 1.20.1 | Client and server | 2025-02-03 |
Questions
Does Thorm's Bosses need Geckolib?
Can a server run Thorm's Bosses without players installing it?
Which game version does Thorm's Bosses support?
In the catalog
Thorm's Bosses is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 34,764 mods support Minecraft 1.20.1.
More from Thorm
Similar mods
What the author says
Travel far beyond the End void, discover alien materials, craft powerful armor sets, and face the ultimate cosmic guardians!
Official listing
- Modrinth page
- modrinth.com/mod/thorms_bosses
- Owner
- Thorm
- Published
- 2025-06-23
- Updated on Modrinth
- 2026-10-06
- Facts verified
- 2026-10-15