The sword resembles an ordinary Katana in dormant state its hilt a greenish yellow color with a grey tattered ribbon attached to its end. When in shikai form the blade shows a strange rune like rust pattern along its blade which becomes a deep orange color
“The blade gives to my allies, the blade takes away from my enemies, come forth and feed Shuukaku Ken!”
This blade holds two shikai commands it has a duel nature to rust away and restore. Command 1: Wither away Shuukaku ken- The blade of Shuukaku Ken glows a soft orange color giving the look of living rust, its attack “wither “ acts as a particle vacuum sucking the energy of the surrounding area. I strike of the blade on a person or animal causes it to dry of their energy turning them slowly into husks. This side of the blade represents the part of Nyxy’s soul that screams for vengeance. Command 2: Restore the barren Shuukaku ken- The blade of Shuukaku ken ripples the air currents returning what it fed upon into an being of Nyxy’s choosing. Her soul must be in a peaceful state for it to accept this command it considers feeding on energy much more pleasurable then sharing its bounty.
A focus of Nyxy's soul brings about the formation of this weapon which forms into a long handled Scythe with a glowing rust particles drip from its tip. The grey ribbons now decorate the top of the scythe and the bottom of the hilt.
Command:(Keyword Devour)- “The blade hungers for a souls bounty swallow all in my path Devour Shuukaku Ken!”
As Nyxy sweeps her blade into the wind the blade slowly rusts away, this summons a rolling mound of rust like substance rains down after her enemies. The particles are a substance that feeds off the spirit energy of her enemy. Weak spiritual beings are fully consumed as well as the land around her becomes a barren field if any natural life is in its path. With concentration she has control of the flow patterns of this mound raising it above or deep into the ground below to rise up as a geyser spraying her enemies.