The most powerful blow!

At the place where the two people collided, all that could be seen was a huge blasted pit!
A moment later, the two had moved to different positions and started a close combat!
For a moment, the nearly 20,000 people present could only see a blue lightning and a black and purple light colliding in various places in the square!
Sometimes in the air, sometimes on the ground, sometimes on the edge, and sometimes above the houses around the squares!
Boom boom boom!
Boom boom boom!
The...