Concept Art of two of Sigma's attacks. Chaos Magnus Rotation (top-left), and Magnus Corona Cutter (bottom-right), information on both attacks below.
Chaos Magnus Rotation:
Sigma charges chaos energy into his hand and releases it as a sphere-like projectile, as the projectile travels, it erects 3 spiraling pillars of chaos energy that protect it before detonating at a distance.
Magnus Corona Cutter:
Sigma infuses his chaos blade: katana with his black chaos energy to extend the blade and when swung, the blade creates small explosions upon impacting objects.
Sigma the Chaos Fox (c)