Path of the Wrathful Spirit (GGGH)

Often  the most powerful spirits who haunt the living do so because of overwhelming anger.You have offered yourself as a vessel for these rage-filled shades, sharing your body with one or more. Usually, their presence within you is passive, And these spirits of wrath only whisper to you. However, the frenzy you enter in times of battle allow you and your internal allies to fight as one. At such times, most barbarians of this path weild two-weapons, unleashing phantom fury to guild them as they become whirling cyclones of destruction. 

Vigilance of Spirits Within

Starting when you choose this path at 3rd level, the spiritual presence within you warns you of danger. You gain a bonus equal to your Constitution modifier (minimum 1 on Wisdom (Perception) checks, and opertunity attacks against you are made with disadvantage while you are wielding at least one melee weapon.

Level 3: Phantom's Strike

At 3rd level, your Rage can allow a spirt to briefly take control of part of your body, using your flesh to strike at enemies. When tou take the Attack action while raging, as part of the same action, you can make one additional attack  using a light melee weapon or unarmed strike. If this attack hits, it deals 1d4 extra damage. When you deal this extra damage, you deside whether it is neurotic or psychic. The extra damage from this feature increases as you gain levels in this class, becoming 1d6 at 5th level, 1d8 at 10th level, and 1d10 at 15th level.

Ghostcunning

At 6th Level, you gain resistance to necrotic and  psychic damage, and for one minute after you start your Rage, you gain advantage on all death saves ans saving throws against being frightened. 

Apparition's Stride

At 10th level, the spirits within you draw spectral essence from you fallen foes. Whenever you reduce a creature to 0 hit points, you gain a flying speed equal to your walking speed until the end of your next turn. If your flying speeds ends while you are in the air, you fall if nothing else is holding you aloft.

Phantom's Revenge

Starting at 14th level, as a reaction when a creature within 5 feet of you with an attack roll, you can attack that creature using a light melee weapon or unarmed strike. On a hit, your attack deals the extra damage from you Phantom's Strike feature.