Minecraft Java 1.21 Mods
Browse 13 free mods for Minecraft Java 1.21 — popular picks include Complicated Bees, Dissolver - Item Transmutation, Dissolver Enhanced - Item Transmutation (EMC).
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Complicated Bees
Bees - but complicated. Mutations, crossbreeding, and genetics! Almost entirely data-driven, and very modpack-friendly.
Dissolver - Item Transmutation
Convert items into any other stored items based on its value (EMC).
Dissolver Enhanced - Item Transmutation (EMC)
Convert items into any other stored items based on its value (EMC).
catch and tame
"Tame, capture, and carry literally ANY monster in Minecraft with the powerful new Tame Balls! Breed dynamic Mutants, build a Pet Hospital, and play fetch with exclusive custom dogs like Huskies, Golden Retrievers, and Boston Terriers!"

Grimm's Mod
Everything you could want! Leveling, features of old mods, economy, technology, custom items, blocks, commands, transmutation of items and even more!
Biomorphosis
A mod about mutations and evolution, where you control an organic ecosystem, creating structures and creatures from living matter. Harness biomass to develop your colony, but be prepared for the dangers your experiments may bring
Velorise EMC
A progression-focused EMC mod with transmutation, world tiers, alchemical machines, custom equipment, boss arenas, and endgame challenges.
The Gifted
Unlock abilities by surviving danger, injecting powerful serums, or experimenting with alien tech and mutation.

Ashen World
A Fallout-inspired survival mod for NeoForge that introduces radiation, mutations, contaminated environments, chem crafting, and dangerous evolutionary changes to your Minecraft world.
Replicator First Type
Evolving slimes harness solar energy and develop genetic mutations. Predatory spiders create evolutionary pressure. Features 12+ genes, horizontal gene transfer, DNA scanner. Watch natural selection in your Minecraft world!
Project Extended Mod (1.21.1, 1.20.1) – New Features to ProjectE
Project Extended Mod is a mod that adds features to ProjectE that EE2 would probably have had it been made in modern times. Features: Restricting Learning and Condensing Items that are prevented from being learned in transmutation tables and from being reproduced in energy condensers can still be used as fuel to provide EMC. Interdiction […]
ProjectE Mod (1.21.1, 1.20.1) – Never Mine for Ores Again
ProjectE Mod brings back the classic alchemy gameplay of Equivalent Exchange 2. It lets you break down unwanted items into a universal energy called EMC (Energy-Matter Covalence). You can then use this EMC to create almost any other item, turning useless materials into valuable resources. The mod includes famous items like Transmutation Tables, Energy Condensers, […]
Alchemical Resonance Mod (1.21.1, 1.20.1) – Automate Endless EMC and Craft
Alchemical Resonance Mod extends ProjectE with upgraded energy collectors, link blocks, and endgame gear. It brings high-tier progression to modern game setups. Players can produce huge amounts of EMC with power flowers and automate item transmutation. The mod also introduces top-tier armor sets and powerful weapons with special combat abilities. Features: Adds upgraded EMC collectors […]