Izayoi strength 12

Izayoi’s eyes had widened to the utmost.
“Then—There’s no reason for me to go easy on you, you White haired brat—!!!”
With a roar, Izayoi gave a kick to the back of His Highness’s head with a power capable of smashing mountains and rivers.
“Gya…!!?”
The hands that have been brought up to defend himself had been kicked aside and it connected to his head. It wasn’t that His Highness was lax in his alertness, but the sheer rage in Izayoi’s strike had made it impossible for his reaction to defend himself completely.