Lost Features adds some features that didn't end up getting added.
Features so far:
Fireflies
Sculk Jaw
Barnacle (Monster of the Ocean Depths)
Wildfire (Hovering Inferno)
Moobloom
Chillager (Iceologer)
Ice Chunk
Copper Golem
Tuff Golem
There are both Forge and Fabric versions of this mod.
The Fabric version requires the Fabric API.
Most entity textures by sheslong.
This mod is Forge-Fabric compatible. A Forge client can join a Fabric server, and a Fabric client can join a Forge server. This hasn't been tested much, but it's possible and seems to work.
No files available for download.