Path of the Ripper

May it be lack of finesse, brute force or passion for it almost as an art, it is sure you will make a bloody mess. Rarely uses weapons, usually improvised sharp objects to help in tearing tissue apart. You will dismember your foe while still alive and fighting. 

Predator Instinct

Starting when you choose this path at 3rd level, when a creature  within 60 feet starts bleeding you must make a Wisdom Saving throw (DC 5 for friendly creatures, 10 for neutral and 15 for hostile), you can also choose to fail the save, if you fail you enter Rage and must use your reaction to take the dash action to reach that creature, then you can make an unarmed opportunity attack against it.

You can also trace the smell of bleeding creature of which you have a sample of up to a range of 1 mile + WIS.

Open Vein

Beginning at 6th level, when you deal slashing damage you can make the target take 1d4 of bleed damage each subsequent turn instead.

After 3 turns of bleeding a medium sized creature (5 turns for large creatures) must make a CON saving throw (DC 10+ your DEX) or bleed to death. The bleeding can be stopped by bandages and magical healing effects. This effect doesn't work if the creature doesn't have body fluids (ghosts, undead, elementals)

Hate will tear us apart

Beginning at 10th level, while raging and grappling a target you can use your bonus action to attempt to amputate a limb or tear one organ out of the creature body, make a strength roll against their CON score as a DC. On a success inflict the bleed condition to the target, the grapple ends and the creature loses that limb if possible (doesn't work on oozes, ghosts etc). If amputation isn't possible but the creature has a physical body you can instead reduce their maximum HP by 3d4, by ripping part of their body away.

Dark Assimilation Ritual

You can create a magical circle with body parts of a creature and perform a ritual eating its heart to gain part of its strength and powers. 
The ritual takes 1 hour to complete, you must assemble a circle on the ground and connect the pattern with blood trails, placing the significant part of the slain creature around it.
then you must place yourself in the middle of the circle, shower and soak your self in its blood, speak your tribal mantra to comunicate which feature you are wishing to assimilate and then proceed to eat its heart. When executed correctly you will fall in a trance state and quickly relive in your mind all of the creature life and emotions, culminating in its death, upon which you will open your eyes and awaken with its powers flowing in your body.
You can choose to gain one of its Ability Scores, Condition Immunity or Racial Feature. 

You can forgo the ritual and only eat the heart (1 action) to gain 1 of the benefits for the duration of 1 hour.  You cannot have multiple benefits at the same time.

You can perform the full ritual only once per week.