It's not a mod for everyone.

Personally this mod is amazing. Not only because of the good amount of mobs it adds, but also that each one is completely different from the other (and a good part can be summoned as companions!) They are morbid, terrifying, deadly and make the Minecraft experience a little nightmare ( you can't even mine coal to cook your food in peace anymore) and almost any aspect of Minecraft that seemed simple can now go horribly wrong by the forces of nature. On the other hand, each mob can drop parts of its body to use in combination with each other to create weapons and tools with different effects and powers (although frankly what is worth more are the tools than the weapons) such as being able to mine several blocks at the same time to launch giant energy balls or drain the life of your enemies. It's challenging, very difficult, and maybe a bit unfair due to the fact that from the first night everything can go to hell (the Nether especially) I love it, and I don't know why. Give it a try alone or with your friends along with another mods that can make your experience more pleasant and bearable or even more tortuous.