This blade initially takes the form of a greatsword that is 6 feet from sword tip to end of the hilt. The blade is almost wave-like in appearance but as sharp and deadly as a normal sword. When attuned to, however, the Shardblade can take the form of any metal weapon the user is proficient with (i.e. glaive or dagger). It takes a bonus action to change its form.

 

Magic Weapon

The Shardblade is a magic weapon that grants a +3 bonus to attack and damage rolls made with it. The blade also functions as a weapon of warning, sword of sharpness, and defender.

Sever Soul

When the blade slices an inanimate object, the object is cut cleanly, no matter the material. When attacking a living creature, the blade leaves no mark but passes through that area. If you roll an 18 or above on the die, roll a d8 and consult the table below. The creature loses the use of that part of their body. The limb remains, but any healing factor does not work on the limb, and spells such as regeneration are not effective.

d8	Body Part	Result
1-4	Leg	½ speed
3-5	Arm	Cannot use that arm to hold objects, including weapons and shields
7	Spine (waist)	Prone, can only move by crawling
8	Neck	Death if it only has one head

 

Spellcasting

You can use Shardblade to cast Fly 2/day without verbal or somatic components.

Summon

As a bonus action, you can summon or dismiss the blade into a pocket dimension.

Sentience

Shardblade is a sentient chaotic neutral weapon with an Intelligence of 18, a Wisdom of 14, and a Charisma of 16. It has hearing and truesight out to a range of 60 feet.

The weapon can speak, read, and understand Common and Sylvan, and can communicate with its wielder telepathically. Its voice is ominous and quiet. While you are attuned to it, Shardblade also understands every language you know.

Personality

Shardblade speaks with a low, whispering voice. Very little can usually be understood other than "free me." 

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

Notes: Heavy, Two-Handed, Graze