The devil didn't expect that the dragon would do something so foolish. After all, he had tried earlier and it was useless. The dragon couldn't do anything as long as he expanded that area.
But the moment the devil expanded the targets, the heads suddenly turned around, finding a different target.
Surprisingly, there were three spikes that ended up being bitten. They all came from the right hand.
The devil realized that the dragon was trying to test his power. After knowing that his right hand would always be the weakness, the dragon would aim for this until he defeated him.
On the other hand, the dragon saw much more than a mere right hand. He observed the reaction speed, timing, and Magic Power.
He realized that the right hand was still able to utilize the same power. But it required more Magic Power and the timing was slower than the left hand. The reaction speed remained normal, so it just gave away the other two's information clearly.