Here is a very useful addon for modification, which is called the Skill Tree. Simple RPG Skills will introduce many new skills for you. It will be able to increase your damage, increase health, remove damage from falling and even give good luck.
How to install Simple RPG Skills Mod
- Download and install Minecraft Forge
- Install The Skill Tree
- Download a Mod
- Unzip it and copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods