Thanks HoboMaggot, the link is working now. My 1.12.2 mod adds lots of mobs to Minecraft. I have tested my mobs in 1.14.4, 1.15.2, and 1.16.4. The higher the mc version the more robotic and dysfunctional my mobs became. And in mc 1.12.2, 500 mobs would produce the same lag as 10 in 1.16.4. I concluded that Minecraft 1.12.2 is the best version for modded Minecraft, particularly if you like creatures.