Prefixation Mod 1.12.2 adds new levels to your weapons and armor. You can either reduce the level of weapons or make it even cooler and which will do much more damage . 

     When you create weapons, armor, an ax, a pickaxe or a shield, a special prefix will be added to them or you can say a new level in which the improved damage is automatically set, the armor will become even stronger or advanced tools will be added.

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     After downloading in the archive there will be two files Prefixation-Mod-1.12.2.jar and MiningLib-1.12.2.jar which you need to copy to the .minecraft / mods folder and before that do not forget to install Minecraft Forge .