Equalizer

This rogue has specialities in martial prowess granting them the ability to disarm foes, blind them, and even break their weapons. 

Counterpoise

Disarm or sunder your opponents weapon. The DC check is equal to 8+ Proficiency+Dexterity modifier.

This does not envoke attack of opportunity.

If the opponent is disarmed the rogue is granted his sneak attack bonus against the disarmed opponent. 

Wounding Strike

You inflict deadly wounds with finese weaponry. After hitting a creature with a sneak attack you can choose to fatally wound them. You can force that target to make a Constiution saving throw (DC 8 plus your Dexterity modifier and Proficiency Bonus).

If the save fails, the target has Vulnerability to piercing for 1 minute. 

You can use this ability as many times as equal to your proficiency bonus. Recharges on long rest. 

Entomb

Using a finese weapon the rogue impales an enemy of their choice. The rogue can choose to leave their weapon in the enemy causing them to freeze up in shock. The enemy must make a Constiution saving throw (DC 8 plus your Dexterity modifier and Proficiency Bonus) or be paralyzed for one minute. The rogue must leave their weapon in the enemy for the effect to last. 

If something removes the blade from the enemy then the affect wears off.  The affected creature reattempts the save at the end of their turn. 

Equalizer

All creatures within 20 ft must make a constitution saving throw equal to the rogues (8+Proficeincy+Dexterity). 

If a creature fails their constition save then all of their armor and weapons falls to the ground. 

Creatures that do not wear armor lose their Dexterity bonus to their AC for one minute.