Path of the Specter

Most barbarians are familiar with death, but no more than those that follow the Path of the Spectre.  Once slain in battle, a barbarian that follows this Path was resurrected by rage and shadow and has come back as a twisted version of their previous self.  Now wielding a new found power, these barbarians combine a mixture of stealth and magic to quickly eviscerate their enemies before they even realize they are there. 

Made of Shadow

Starting when you choose this path at 3rd level, the shadow within imbues you with the ability to hide from the eyes of onlookers and to deceive those that ask questions.  Gain proficiency and expertise in Stealth and Deception.  Your proficiency bonus is doubled for any ability check you make that uses either of the aforementioned abilities.

Severed Soul

Beginning at 6th level, when you enter your rage the Specter within you is unleashed.  The Specter appears within a range of 60ft from you and remains for 1 minute, unless your rage is broken.  When it appears it can make a melee spell attack (using your Charisma modifier and proficiency) against a creature within 5ft of it.  On a hit, the target takes necrotic damage equal to 1d6 + CHA modifier.  As a bonus action on your turn you can make the spectre move up to 20ft and repeat the attack against a creature within 5ft.  At level 10 the damage is increased to 2d6 and at level 14 the damage is increased to 3d6.  After the Specter is summoned you can't use this feature again until you finish a short or long rest

Birthed from Nowhere

At level 10 the Specter within you grows and grants you the ability to enter the ethereal plane momentarily.  While raging you can cast the spell Misty Step as a bonus action.  This can be done up to a number of times equal to your Charisma modifier.  This feature refreshes after a long rest.

Blinded by Rage

At level 14, the Specter has completely joined with you and has changed your physical appearance.  You have become gaunt, paler, and your eyes have adopted a purple hue.  These changes have also granted you improved Dark Vision allowing you to see up to 120ft.  This power grows even stronger when Raging and grants you Blindsight up to 30ft.