This unique weapon hungers for souls and is a potentially very powerful weapon. This blade is made of a foreign metal that is dark as night and swirls like that of a galaxy to the chosen wielder, but to all others this blade appears as a dull black blade that is ice cold to the touch.

Dormant.  While Soul Cleaver is in a dormant state, you gain a +1 bonus to attack and damage rolls made with this magic weapon. When this blade kills a creature, excluding undead and constructs, it consumes its soul gaining +1 to its soul count, when first gained this sword has 2d6 - 1 souls. In addition, whenever you roll a 20 on your attack roll with this weapon, each creature of your choice within 5 feet of the target takes 5 necrotic damage as shadow energy engulfs the weapon.

Awakened.  Upon consuming 10 souls, Soul Cleaver reaches an awakened state. You gain the following benefits: Soul Cleaver grows. The bonus to attack and damage rolls increases to +2. On a hit, the weapon deals an extra 1d6 necrotic damage.

Exalted. Upon consuming 20 souls, Soul Cleaver reaches an exalted state. You gain the following benefits: Soul Cleaver grows.  The bonus to attack and damage rolls increases to +3. Once the blade grows into exalted form, each additional 10 souls it consumes it deals an additional 1d6 slashing damage. (Weapon's max soul capacity is 60, so at 60 souls this weapon deals an additional 4d6 slashing damage).

Curse: If the wielder of this blade dies or someone is killed by the weapon, the weapon will consume their soul. Only the wish spell can bring a person back to life when they die this way. This curse can only be removed by that of a wish spell. The remove curse spell only temporary halts this effect for 24 hours.

Proficiency with a Halberd allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Damage: Necrotic, Heavy, Reach, Two-Handed, Cleave