Rock Skin

At 3rd level, your ki seeps into your skin, hardening like a rock when you’re struck. At the start of each of your turns, you gain 1 temporary hit point.

    At 9th level, the number of temporary hit points you gain increases to 2, and at 17th level it increases to 3.

Divide and Conquer

At 3rd level, you can use Wisdom in place of Strength for any ability checks you make to start or maintain a grapple or to shove a creature.

Dreadnought Kata

At 6th level, once on each of your turns when you hit a creature with an unarmed strike granted by Flurry of Blows, you can perform one of the following:

• Meteor Fist - you deal additional fire damage equal to one roll of your Martial Arts die and you take fire damage equal to one roll of your Martial Arts die. The damage you take can't be reduced in any way. 
• Sonic Punch - you can knock the creature prone or push it 5 feet away from you.
• Eye Gouge - the creature has disadvantage on attack rolls and ability checks until the end of their next turn.

Bruising Spirit

At 11th level, once on each of your turns when the target of your Stunning Strike succeeds on their Constitution saving throw, you can recover 1 ki point. You can use this feature a number of times equal to your Wisdom modifier, and you regain all uses when you finish a long rest.

Close Mind

At 11th level, you can use your Stillness of Mind feature as a reaction, instead of an action.

One Hundred Hand Punch

At 17th level, when you hit a target with an unarmed strike, you can make another unarmed strike against the same target. You can continue making unarmed strikes until you miss or the target is reduced to 0 hit points. Once you use this feature, you can’t do so again until you take a short or long rest or spend 4 ki points.