Nautilus & Spears | Mounts of Mayhem
by Gospi
With Nautilus & Spears | Mounts of Mayhem, players gain nautilus mounts, spears, nautilus zombies and armor, all added to a Forge or NeoForge world.
What it does
The mod adds mounts, spears and armor based on the nautilus, along with nautilus zombies and other mobs and items. It is a Mobs mod that also fits the Adventure and Equipment categories, so it touches combat, exploration and gear alike. Players can collect many spears and armor pieces, and the mod is meant to make combat and encounters more intense and varied.
Both the server and every player need the mod, because the environment is client and server. Builds exist for Forge and NeoForge only, covering 1.20.1 and 1.21.1. The NeoForge file 1.9.8 for 1.21.1 is the latest release, while the Forge file 1.4.2 for 1.20.1 is flagged as bugged and carries an alpha channel. The mod is released under the MIT License and is open source, and its source code is public.
The mod carries over elements from the Mounts of Mayhem content of earlier Minecraft versions, so older items and mobs return with the update. The author notes that a spawn issue was partly fixed, but not fully. A backport fix for this mod is published separately and depends on it.
Key features
Nautilus mounts
Mounts based on the nautilus can be ridden, adding a new way to travel and fight across the world.
Spears and nautilus armor
A range of spears and nautilus armor pieces adds equipment choices to melee and mounted combat.
Nautilus zombies
Zombies built around the nautilus theme add new hostile mobs to the overworld.
Mob spawn fix
The mod changes how some mobs spawn, though the author reports the fix is incomplete.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Required by 1 mod
Use cases
Who it’s for: Players who want more mobs and gear in their Minecraft Java world, and server owners who run Forge or NeoForge with both sides updated. Good for groups who use mounts and spears in shared adventure maps.
How it compares
Krakentilus is a Forge and NeoForge mod for 1.20.1 – 1.21.1 with the same client and server environment, but it is under All rights reserved and is not open source. Backported Spears is open source under the MIT License and covers 1.20.1 – 1.21.10 on Fabric, Forge and NeoForge, so it reaches more loaders and versions. Ruined MC Live is NeoForge only, for 1.21.8 – 1.21.9, and is released under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Nautilus & Spears | Mounts of Mayhem | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-02-21 |
| Krakentilus | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2025-11-11 |
| Backported Spears | Fabric, Forge and NeoForge | 1.20.1 – 1.21.10 | Client and server | 2026-09-23 |
| Ruined MC Live | NeoForge | 1.21.8 – 1.21.9 | Client and server | 2025-10-04 |
Questions
Which loaders does Nautilus & Spears | Mounts of Mayhem support?
Does the server need Nautilus & Spears | Mounts of Mayhem?
Is there a fix for the Forge 1.4.2 file?
In the catalog
Nautilus & Spears | Mounts of Mayhem is one of 11,058 Mobs mods on ModsFinder, and one of 6,527 Mobs mods for Forge. 32,366 mods support Minecraft 1.21.1.
More from Gospi
Similar mods
What the author says
This is a mod that transfers the elements of the Mounts of Mayhem drop to previous versions of Minecraft. In it you will find a variety of spears, nautilus, nautilus zombies, nautilus armor and many other interesting objects and creatures. This mod will add new elements to the game that will make it more intense and…
Official listing
- Modrinth page
- modrinth.com/mod/nautilus-spears-mounts-of-mayhem
- Owner
- Gospi
- Published
- 2025-09-28
- Updated on Modrinth
- 2026-02-21
- Facts verified
- 2026-10-15