This mod recreates the Engender mod by Mrbt0907 for 1.20.1 with content mostly consistent with the original: Craft up fusion parts and fuse them with mana and entropy to create an army to battle against foes.

Comparison between the original:

Can use configs to configure certain display messages, leveling and leveling stats, along with the follow range of engender mobs
Gameplay is catered more toward survival, with systems like mob conversion being or planned to be reworked to fit in with survival gameplay, recipes changed for either more difficulty or to match the more recent versions of the game, and the planned addition of newer mobs that aren't in the original Ex: pillagers, ravagers, and the warden
Added additional ai to certain creatures to make them fit with where they are, like the wither's stunnable lightning

Notes:

This mod plans to add all the remaining mobs from the original, but also add new content, rework certain mobs, add new structures, modify systems, and rebalance mobs(both the tier 5s in the mod are extremely powerful and need further configuration for balancing)
This mod is under development and some mobs and equipment have yet to be added
This mod is survival friendly, but wild engender mobs are planned to be added soon
This mod has a diverse config so you can modify attributes of mobs, but in a broad sense, not directly, like the attack range, the boost from certain attributes. In future updates, most if not, all mobs will be completely configurable in their stats, and will also be configurable for their hero abilities
The Wither Storm has not been added yet. Excluding the initial release, I will add mobs based on tier, so I will finish all Tier 1 mobs and mobs planned to be Tier 1 first, then the next tier. So that means mobs like the Wither Storm will be completed at a much later date, along with future Tier 6 mobs
Plans to port to newer versions are uncertain for now, but will mainly be considered after the completion of Tier 5

Currently Added Mobs:

Tier 1: Chicken, Cow, Mooshroom, Pig, Sheep, Bat, Rabbit
Tier 2: Wolf, Endermite, Silverfish, Snow golem
Tier 3: Zombie, Skeleton, Creeper, Spider, Vex, Slime, Magma Cube, Chicken Jockey, Spider Jockey
Tier 4: Enderman, Cave spider, Wither Skeleton, Blaze, Pillager, Witch, Vindicator, Killer Bunny, Guardian
Tier 5: Evoker, Wither, Elder Guardian, Skeleton Horsemen

Age of Engender