Boom.
The monster possessed amazing regeneration, incomparable to anyone else, so Stroph decided to destroy his enemy with one powerful and crushing attack.
Anyone watching their fight from the sidelines would have seen a stunning sight. First, Stroph moved to the monster's leg in the blink of an eye and cut it off, thereby causing the monster to lose its balance.
Then Stroph used a form of light to gain incredible physical power. With it, he was able to lay such a gigantic monster on the ground simply by grabbing it by the paw. The moment the monster fell, Stroph used the form of darkness and quickly flew upwards over the monster.
The final chord of their fight was Stroph's transition from his darkness form to his light form and his deadly attack from the sky.
Boom.
Creation is hard, cheer me up!