With a modification called Random Loot killing mobs or just walking through the dungeons, you can get three types of cases, of which will fall swords with unique features: with a random amount of damage, speed and special abilities.
How to install Random Loot Mod
- Download and install Minecraft Forge
- Download mod
- Do not unzip it, copy to C:\Users\User_Name\AppData\ Roaming\.minecraft\mods