Tapping into the inner beast a monk can become more powerful and deadly but it is inner peace that stops the monk from being an uncivilized barbarian.

Path of the Inner Beast

When you choose this tradition at 3rd level, your special martial arts training leads you to use aspects of your inner beast. This path also includes instruction in the deft strokes of cartography. You gain the following benefits.

Inner Beast. Choose between Claw, Bite, or Tail. You may use a bonus action to turn part of your body into a bestial appendage for the encounter.

Scaled Beast. If you make an unarmed strike as part of the Attack action on your turn and you have activated a bestial appendage, you gain a +2 bonus to AC until the start of your next turn, while the appendage is active and you aren’t incapacitated.

Beast's Tongue. You can use a bonus action on your turn to make ranged attacks with a beastial tongue deal an extra 1d4 poison damage until the end of the current turn.

Way of the Savage. You gain proficiency with cartographer’s supplies.

One with the Inner Beast

At 6th level, you extend your ki into your bestial appendages, granting you the following benefits.

Magic Bestial Appendages. Your attacks with your bestial appendages count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.

Bestial Strike. When you hit a target with a bestial appendage, you can spend 1 ki point to cause the attack to deal extra damage to the target equal to your Martial Arts die. You can use this feature only once on each of your turns.

Predatory Evolution

At 11th level, you gain the ability to augment your bestial appendages further with your ki. As a bonus action, you can expend up to 3 ki points to grant one bestial appendage a bonus to attack and damage rolls when you attack with it. The bonus equals the number of ki points you spent. This bonus lasts for 1 minute or until you use this feature again. 

Natural Evolution

When you reach 11th level in this class, you can choose 1 permanent evolution appendage.

Dragon Turtle Shell

Your back grows a shell on your back this is natural armor and does not qualify as armor in terms of the Monk's Unarmored Defense.

Eyes of the Beast

Your eyes turn reptilian. 

Hood of the Cobra

From your shoulders to the top of your head you gain a hood of a cobra. 

When you make a successful Bite attack with one of your Bite Bestial Appendage you may add the Venomous Sting attack as a bonus action.

Unerring Accuracy

At 17th level, your mastery of your inner beast grants you extraordinary accuracy. If you miss with an attack roll using a Bestial Appendage on your turn, you can reroll it. You can use this feature only once on each of your turns.

Final Evolution

When you reach 17th level in this class, you can choose 1 final evolution appendage.

Elemental Charge

Your insides begin to coat and take shape of the element of your choice.  You can choose acid, cold, fire, lightning, poison, or thunder for the element. You gain a resistance to that element that you have chosen.

Monstrous Growth

You and your inner beast become one allowing you to become one size larger once per long rest.

Your carrying capacity is increased.

You gain disadvantage on stealth.

You gain advantage on all Unarmed Strike's, Flurry of Blows, and Bestial Appendage attacks.

Wings of the Drake

You grow scaled wings out of your back granting you a Flying speed the same as your Walking speed. As a bonus action you can take off into the sky.