Demon Weapon

Your bloodline was tainted by a foul experiment that involved the fusion between a human soul and a weapon, allowing your body to change form almost instantly and appear as nearly any weapon imaginable. Your power is amplified by eating the souls of monsters, and the intense training you partake in with your weapon meister.

Weapon Transformation

Starting at 3rd level, whenever you rage you can cause part of yourself to transform into a single weapon of your choice until your rage ends. Ranged weapons don't possess the 'ammo' or 'loading' properties and fire infinite ammunition which vanishes after dealing damage.

You can attack with your weapon form as if you were wielding it, using the appropriate weapon stat block. Weapon attacks made with your weapon form are magical for the purposes of overcoming resistance.

Your weapon form also gains a +1 bonus to its attack and damage rolls at 6th level, increasing to a +2 at 14th level.

Soul Resonance

Starting at 3rd level, you can grow a close bond with a creature that correlates with immense strength in combat. To use this feature, choose a creature that you can see. The following must all be true between both you and that creature:

• Trustful. We both trust each other with our lives.
• Friendly. We get along with and appreciate each other.
• Reliable. We've both shown to be reliable with many aspects of our company.

If you're raging while all 3 are true, whenever you are within 15 feet of the creature, you gain an additional attack whenever you take the Attack action on your turn. You can change the creature used by this feature once after every long rest.

Aggressive Parry

Starting at 6th level, while raging, you can occasionally block dangerous effects before they make contact.

If a creature within attack range of your weapon form is hit by an attack, you can use your reaction to add one of your weapon form's damage dice to their AC. If you activate this feature using a ranged weapon, the damage die used by this feature is reduced by one category.

Faithful Manuevers

At 10th level, you've mastered your fighting technique, allowing your entire body to flow like an elegant weapon.

You possess an additional reaction on each of your turns which can only be used to make opportunity attacks and activate your Aggressive Parry feature.

Witch's Soul

At 14th level you become capable of eating the soul of a powerful monster to gain a devastating new ability. The DM determines what monsters are qualified to possess this soul, and once consumed, grants the following feature:

• If you score a critical hit against a creature with your weapon form, the target must succeed on a DC 10 + (your Strength or Dexterity) Constitution saving throw or be vulnerable to the attack's damage.

If you created your Demon Weapon barbarian at or above level 14, ask your DM if it would make sense for your character to have already eaten this soul