Eternal Crimson Blade

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If all hope is lost, Shou uses one of his Trump Cards, the Eternal Crimson Blade.
To summon it, Shou needs to sacrifice one drop of his blood which is filled with some of his life energy. A magic circle will appear after wards where Shou drops Zeon into it, Zeon will then transform into said weapon and will be carried out of the circle by numerous chains, only individuals who possess a massive amount of Mana may control this weapon due to its instant berserk nature if the user is not liable to control it.
The weapon can easily cut the boundary of time, space, void and reality, and it is primary used to erase planetary class enemies from MUGEN.
The attack which Shou uses with this weapon is called "Divine Extinction" where Shou cuts the enemy twice creating a cross like shape cut which will devour the enemy into nothingness.
The sword can only be used by Shou in Final release form since all of Shou's Mana will be available to control it.
The length of the sword is Infinite, since it was inspired by the Ideon Sword ^_^"