The way of the bat has given you strength to kill many different Things with only your fists. When you choose this subclass you gain Smithing Tools and Proficiency with them. 

The Dark Knight Rises

If you would have your HP reduced to 0 you can regain all your HP as a bonus action.

Kryptonion King

You can deal a extra 8d12 and gain +15 AC

Flying Bat Technique

Starting when you choose this tradition at 3rd level, you can manipulate your Ki to make the bonus action to Fly towards your target from the sky dealing 1d12 Bludgeoning Damage.

The Dark Knight

At 6th level, you gain the ability to use the Sneak Attack Action.

Robin Collector

Beginning at 11th level, you can summon a Roc by whistling.