If you are looking for an add-on to increase the game difficulty a few notches then this is a great option. This means that the world will be a lot more difficult as each mutant is much stronger than its predecessors. Neither of the mutants gets affected by fall damage or knockbacks. Most Mutants will now despawn from far distance Removed Darkness effect for Mutant Enderman for now, the cause of crashing when loading into a world.