Azure Peacock {Ruri'iro Kujaku}

Bloom. This weapon functions as a Katana, and has the finesse property. It also functions as a +1 magic weapon. When you attack a creature with this magic sword and hit, maximize your weapon damage dice against the target. 

Split and Deviate. When you attack a creature with this weapon and roll a critical on the attack roll, that target takes an extra 14 slashing damage. Then roll 1d10. If you roll a 7-10; you lop off one of the target's limbs, with the effect of such loss determined by the GM. If the creature has no limb to sever, you lop off a portion of its body instead.

Wisteria Willow. As an action, you can cause spectral vines to spring up and reach for any number of creatures within 30 feet of you that you can see. The creature must succeed on a Strength or Dexterity saving throw (its choice) or be restrained, as long tendril vines entangle them. While restrained by the vines, the creature repeats the saving throw at the end of each of its turns. On a success, it frees itself and the vines vanish from around it. You can use this ability once per rest (short or long). Any creature restrained by the vines at the end of its turn takes 1d12 necrotic damage, which you absorb as hit points or temporary hit points (your choice). 

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This weapon was created by an iconic mage of legend; Cameron the Clairvoyant. 
Ruri'iro Kujaku (瑠璃色孔雀, Azure Peacock), "nicknamed" Fuji Kujaku (藤孔雀, Wisteria Peacock). It has the form of an average katana. It has a bronze tsuba shaped like a German cross, purple hilt-wrapping, and fuchsia-colored sheath.

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

Notes: Damage: Slashing, Maximize Weapon Damage, Damage, Combat, Finesse, Light, Nick