An old and quite popular modification, with which many new mobs will appear in your world, from peaceful big giants to terrifying elementals and formidable shadows. Each mob has its own unique model, size and biome habitat.
Lycanites Mobs Mod for Minecraft 1.15.1/1.15
This mod can really greatly diversify the gameplay in Minecraft. Play with new mobs, of which there are hundreds!
Download Link: lycanitesmobs_1.15.1_126.96.36.199