Union.

Yang Dao and Dao Yin had zero hesitation in their minds as they started to exchange blows with each other. The demons who stood at the side were shocked. They did not expect Yang Dao, a human, who popped out of nowhere, to stand toe-to-toe against their monstrous instructor. The battle raised storms of dust. 

However, none of the people were backing off, if Dao Yin came in hard, then Yang Dao redirected her with softness, and vice versa. Even more, if the moves done by Yang Dao were orderly, Dao Yin will counter with a chaotic flurry of attacks. However, somehow, the two people did not seem to be fighting against each other. 

It was like they were leading their skills to a higher level with every blow. Tato has been hiding in the void, and when he saw Yang Dao he shivered. He could tell that if these two were serious, he will not be an opponent.