Way of the Hollow Soul

Way of the Hollow Soul monks create absences of sound and light to disappear from enemy sight, and blind and deafen foes. Striking fast and from unseen corners Hollow Soul monks hide and make stealth attacks mid-combat with a knack for throwing enemies off their trail. 

Level 3: Extra Proficiency

 You gain proficiency in the Stealth skill. If you already have proficiency with the Stealth skill you gain proficiency with another skill of your choice.

Level 3: Vanishing Strike

After you take the Attack action or use your bonus action to make an unarmed strike you can spend two ki points to become invisible until the beginning of your next turn. This invisibility is also ends if you make an attack or cast a spell before the beginning of your next turn

Level 6: Sudden Presence

When you lose invisibility granted by your Vanishing Strike feature you can add 1d4 to hit on your first attack after losing the invisibility. The additional to hit die increases to 1d8 at 10th level and 2d4 at 15th level.

Level 6: Emptying Strike

If you roll a 19 or higher to hit on your modified attack roll from your Sudden Presence feature your enemy must make a Charisma saving throw or be blinded and deafened until the end of their next turn. You may spend a Ki point to increase the save DC by one. You may spend up to three Ki points to increase the save DC this way. Your save DC = 8 + proficiency bonus + Wisdom modifier + spent Ki (If used).

Level 11: Empty Mind

You are immune to unwanted reading of your thoughts. You also can completely hide your intentions from others by emptying your mannerisms of all tells of what you are thinking. When making a save against being Charmed, Feared, or forcibly controlled by a similar effect (DM discretion) you can lower the save DC by two. You can lower the save DC this way an amount of times equal to your Wisdom modifier per long rest.

Level 17: Presence of Absence

You can spend three Ki points to enter an Absence form. In the Absence form you are always considered partially obscured. When you hit an enemy with an unarmed attack in the Absence form you can force them to make a Charisma saving throw. If the enemy fails the Charisma save they are deafened and blinded until the end of their next turn. The save DC is equal to 8 + proficient bonus + Wisdom modifier. If you kill an enemy while in the Absence form you may immediately end your turn. If you end your turn this way you become invisible and take the Hide action. You lost the invisibility granted this way at the end of your next turn, when you take the attack action, or you cast a spell. When you lose the invisibility granted by your Absence Form your next attack is also affected by your Sudden Presence feature. The Absence form lasts a total of minutes equal to your Wisdom modifier + proficiency bonus. The Absence form ends early if you are incapacitated. 

In this form your body seems to constantly shimmer and shadow as your body fades into and out of existence as you make your own being become an absence.