Way of Aura

Many monks can control and manipulate their ki, allowing them to stun and heal and many varying things with their, some might call, supernatural powers. Though very few use this power to protect, whether themselves or their allies. Those of the Way of Aura are trained to protect, though early on one can only protect themselves. 

Protective Aura

Starting when you choose this monastic tradition at 3rd level, you gain the ability to project your aura in a thin layer around your body, forming a sort of armour made out of ki.

When you hit a creature with an unarmed strike, you can choose to manifest your Aura until you finish a long rest. The Aura has a maximum hit point equal to your monk level + your Wisdom modifier, then multiplied by 2. When you would take damage, your Aura takes the damage instead. If this damage reduces your Aura to 0, you take any remaining damage. 

Once per turn, when you hit a creature with an unarmed strike while your Aura is manifested, you can cause the Aura to regain hit points equal to a roll of your Martial Arts die.

As a bonus action, you can expend a number of ki points and cause your Aura to regain hit points equal to the number of ki points expended.

While your Aura has 0 hit points, it can't absorb damage but its essence remains and it can regain hit points as normal.

Once you have manifested your Aura, you cannot do so again until you finish a long rest.

Erupting Aura

Starting at 6th level, you gain the ability to cause your Aura to strike outward, damaging and pushing your foes around you.

While your Aura is manifested, and it has at least 1 hit point, you can use your action and expend 1 ki point to cause a pulse of energy to emit from your Aura. Each creature within 10 feet of you must make a Constitution saving throw. On a failure, a creature takes force damage equal to 2 rolls of your Martial Arts die and is pushed 5 feet away from you and knocked prone. On a success, a creature takes half as much damage and is not pushed backwards nor knocked prone.

When you use this ability, you can expend additional ki points, up to your proficiency bonus in total, to deal 1 additional roll of your Martial Arts die per additional ki point as damage. 

After using this ability, reduce your Aura's current hit points by 1 roll of your Martial Arts die.

Striking Aura

Starting at 11th level, your Aura has become more flexible, allowing it to be used to attack as well as defend.

While your Aura is manifested, your unarmed strikes gain 5 feet increased attack range. Additionally, when you hit a creature with an unarmed strike, you deal additional force damage equal to your Wisdom modifier.

Absorptive Aura

Starting at 17th level, Your manipilation of your ki and aura has allowed you to project it even further, and also to absorb the ki energy of others.

You gain the following features;

Projected Aura - When a creature that you can see within 30 feet of you takes damage, you can use your reaction to cause your Aura to absorb that damage. If this damage reduces your Aura to 0 hit points, the warded creature takes any remaining damage.

Ki Absorption - Additionally, when a creature within 30 feet of you is reduced to 0 hit points, you can use your reaction to regain ki points equal to your Wisdom modifier. If you reduce a creature to 0 hit points, you can use this feature without using your reaction.