Mob Modifiers

Mob Modifiers puts a twist on vanilla mobs giving them enchantment-based modifiers. The modifiers are based on Minecraft's enchantments. Most of the time, a mob will have only one modifier; in rare cases, it will have two. From my observations, more often than not, you will see protection-type enchantments. I think this addon is a good option if you want to add a bit of extra challenge to your game.

Credits: jotista