Path of the Bonecaller

Though your affliction with necromancy or a possible curse, the dead answer your revenant rage. You call forth the bones of the long forgotten to animate, as mindless and furious as your path on the battlefield.

Vessel of the Dead

At 3rd level, your body is a vessel of unlife and persistence. You gain resistance to necrotic and poison damage and have advantage on saving throws against being poisoned.

Call of the Dead

Starting when you choose this path at 3rd level, your rage channels false life into the earth, summoning forth any dead that may answer your call.  Whenever you activate your rage, you may call forth a number of skeletons equal to your proficiency bonus in an unoccupied space within 10ft. They are friendly to you and your allies, and they take their turn immediately after yours. They persist until your rage ends, or they reach 0 hit points.

Your skeletons are unique, and feature a stat block. They use your strength or dexterity modifiers plus proficiency to hit, have an armor class equal to 10 plus your constitution modifier, and hit points are equal to three times your barbarian level. They have no bonuses to saving throws outside of Strength, Dexterity, and Constitution; where they use your respective ability score modifiers. They also share your rage's resistances.

Vengeful Tether

Beginning at 6th level you can restore the vitality of your skeletal summons. While you are raging, you may use a bonus action to expend a hit die and add the number rolled plus constitution modifier. You lose hit points equal to the total rolled, and all active skeletal summons are healed by that amount.

Bonestorm

At 10th level, your summons can sacrifice themselves to deal area of effect damage in a flurry of bone splinters. Whenever your rage ends or when your skeletons reach 0 hit points you can cause them to explode.

Each creature within 5ft of the summons must succeed on a Dexterity saving throw (DC 8 +prof +con) or take magical piercing damage equal to 1d12 plus barbarian level or half as much rounded up on a success.

Unyielding Death

At 14th level, your ties to the dead strengthen your summons, prolonging their lives. Your skeletal summons persist even after your rage ends for a number of hours equal to your proficiency bonus. Your maximum number of summons is still equal to your proficiency bonus.

Additionally as a reaction, you can have Vengeful Tether or Bonestorm trigger whenever a skeletal summon takes damage, potentially healing fatal blows or exploding them as a rebuke.