ModsJava
Toms Mobs
A small collection of server side mobs. No client mods required!
I don't know my version or loader
Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.
No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.
Toms Mobs is a free Minecraft Java mod. Compatible with Minecraft 1.21.11, 1.21.9, 1.21.10, 1.21.7 and newer. Downloaded 102,199 times (via CurseForge). Download it and open it directly in the game.