Banewulf

The Banewulf has studied it's enemies fighting styles. When a specialist is required to assassinate warrior of great feat the Banewulf is the one to take up that mantle. 

Underhanded

Starting at 3rd level, If a creature fails it's attack roll on you, you may use a reaction to attack that creature with a light weapon.

Cull the Nobility

When you attack a creature of the same size that uses a Martial, Light or Heavy weapon, you gain + 2 to your attack rolls you make with a light melee weapon.

The bonus to this attack roll is increased by 1 at the 8th level, 13th level, and 18th level.

Bane Sought

Starting at 9th level, you have advantage on a Dexterity (Stealth) check against Humanoids.

Visceral Combat

By 13th level, you have specialized in assassination arts against specialized fighters. Select 2 weapon types. Whenever you damage these creatures with a light melee weapon, you deal 2 additional weapon die.

Bloodborne

When you reach 17th level, like a blood hound seeking it's prey you move through the battlefield swiftly unhindered by the drove of warriors. Without provoking opportunity of attacks from your enemies, you can move through them at the cost of 0 movement. And those around you that dare walk next to you provoke opportunity of attacks from you.