This +10 greater potent umbral weapon is made of shadow stuff supported by the wielder's mythic power. It's form is highly mutable allowing it to assume the form of any weapon as though it had the greater transformative quality except that it can be transformed as a swift action and that it does not revert to any form if left unattended. It can also be converted to the form of a dull black metal ring instead of a weapon. This ring does not require using one of the wearer's magic item slots. While in the appropriate forms, Barjoskadwaz gains the benefits of the Gravity Bow, Heart-Piercing, Impact, Keen, Umbral Weapon, and Vorpal qualities and spells. Barjoskadwaz does gain the benefit of the keen quality while in the form of a ranged piercing of slashing weapon. The umbral weapon quality continues to function regardless of the weapon's form. The weapon also has a greater rune of striking engraved onto it, its position shifting based on the weapon's form, that multiplies the number of damage dice dealt by the weapon by 4. Critical damage multipliers stack with this multiplying all damage dice.

Half of the damage dealt by the weapon is categorized as shadow damage. Shadow damage functions like damage from a weapon with the brilliant energy quality except that it also affects undead. Nonliving matter is not affected by the shadow damage. If an attack with the weapon misses but would have hit the target without its armor and shield bonuses to AC (including any enhancement bonuses to that armor), the creature still takes the shadow damage. Constructs and objects are not harmed by the shadow damage. Additionally, the first time each round that a creature is struck by the weapon they can make a DC 30 will save to disbelieve the shadowy blade. On a success, the creature does not take any shadow damage from the weapon for 1 round. The Umbral Weapon spell effect only activates if both the shadow damage and regular damage fail to hit the target.

The greater potent special weapon functions like the potent weapon quality except that there is no maximum enhancement bonus, the wielder may add his entire mythic tier to the enhancement bonus, and that the wielder adds half his mythic tier to the enhancement bonus as long as he carries the weapon.

Barjoskadwaz grants it's wielder the following abilities: