A Face in the Crowd

At level 3, while out of combat, when you are within at least 5 feet of 2 other NPCs/PCs who are not in combat or trying to hide, you are automatically considered "Hidden" (as though you had taken the "hide" action). If you successfully land a sneak attack, add 2d4 psychic damage to the attack's damage.

Reap and Sow

Starting at level 9, when dealing sneak attack damage, you may instead choose any number of sneak attack dice to convert into self healing. This can be done a number of times equal to your proficiency bonus + Dex modifier.

In the Face of Insanity

Starting at level 13, when you kill an enemy, you may start to butcher their corpse as a bonus action. Every enemy that can see you must immediately make a WIS saving throw (DC = your Dex Score). On failure, they are afflicted with the "frightened" status effect.

As an action on every proceeding turn, you may continue to butcher the corpse. While butchering, enemies have advantage on attacks made against you Each turn you butcher the corpse as an action (up to 6 turns maximum, excluding the turn you started on) you add a d6 to the next attack you land. If you completely butcher a corpse, the damage dealt ignores resistances and immunities. This process may be interrupted by taking damage, being incapacitated, or any other effect/action that would cause your character to flinch or move. If interrupted, you will instead roll the dice you generated, and heal yourself for half of the sum.

You may do all this a number of times equal to your proficiency bonus. Regain all expended uses with a long rest.

The Frenzy

Starting at level 17, ff a natural 20 is rolled for a weapon attack, you may choose to immediately sneak attack the same target or any target within melee range. This may be done 4 times before requiring a long rest to reset.

When reduced to 50% of your total hp, the number range for critical hits is reduced to 19.

When reduced to 25% of your total hp, the number range for critical hits is reduced to 18.

When reduced to sub 15 hp, you may add your sneak attack damage dice to regular melee attack damage.

A Face In the Crowd

At level 3, while out of combat, when you are within at least 5 feet of 2 other NPCs/PCs who are not in combat or trying to hide, you are automatically considered "Hidden" (as though you had taken the "hide" action). Successfully landing a sneak attack while hidden deals an additional 2d4 psychic damage. 

Reap and Sow

Starting at level 9, when dealing sneak attack damage, you may instead choose any number of sneak attack dice to convert into self-healing. This can be done a number of times equal to your proficiency bonus + Dex modifier.

In the Face of Insanity

Starting at level 13, when you kill an enemy, you may start to butcher their corpse as a bonus action. Every enemy that can see you must immediately make a WIS saving throw (DC = your Dex Score). On failure, they are afflicted with the "frightened" status effect.

As an action on every proceeding turn, you may continue to butcher the corpse. While butchering, enemies have advantage on attacks made against you Each turn you butcher the corpse as an action (up to 6 turns maximum, excluding the turn you started on) you add a d6 to the next attack you land. If you completely butcher a corpse, the damage dealt ignores resistances and immunities. This process may be interrupted by taking damage, being incapacitated, or any other effect/action that would cause your character to flinch or move. If interrupted, you will instead roll the dice you generated and heal yourself for half of the sum.

You may do all this a number of times equal to your proficiency bonus. Regain all expended uses with a long rest.

The Frenzy

Starting at level 17, ff a natural 20 is rolled for a weapon attack, you may choose to immediately sneak attack the same target or any target within melee range. This may be done 4 times before requiring a long rest to reset.

When reduced to 50% of your total hp, the number range for critical hits is reduced to 19.

When reduced to 25% of your total hp, the number range for critical hits is reduced to 18.

When reduced to sub 15 hp, you may add your sneak attack damage dice to regular melee attack damage.