The Mo' Creatures mod adds over 58 new mobs to Minecraft, with both realistic, humanoid, and fantasized creatures, such as the majestic pegasus and fairy horse, and even venomous dragon-like drakes. Some mobs may throw blocks at you, or destroy them. Others may hunt you down on sight, and can even run at your own pace. All these mobs spawn naturally in the Overworld and the Nether, and a few can be found in the Wyvern Lair dimension.
The spawn eggs are located in the Creative mode menu. Default press "E" and find the "MoCreatures" tab.
Many mobs will either attack the player or fight amongst each other, whereas others can fly or even dig under blocks.