Demon Aura

After fighting for a few minutes against a opponent if a member of the demon clan gets in a pinch or wants a extra boost of power he can expel a large amount of demonic energy causing a blood red aura to engulf their body while also turning their hair white, their eyes red, grow claws, and sharp teeth making them look like a real demon. It boosts their demonic powers while also increasing their offensive and defensive prowless as a fighter this also allows them to use the powers and abilities they had as full demon but they must regain control after a few minutes or go insane and revert back to their old demon ways of killing nonstop.