Deak grimaced, that explosion was very dangerous even for him. If he didn't act quickly and used [Wood Wall] to reduce the area of the explosion then one of his students would surely have died.
"Teacher, what the hell is that?" one of his students asked warily with a grim-faced. The hem of his military academy uniform was burned and some scratches were visible on his cheeks from the flying debris.
"I don't know. But it's definitely not mana power. I didn't see the mana in the vortex that formed in his hand but the air seemed to gather and collide with each other to create an explosion" Deak tried to answer by analyzing what he saw. "Whatever it is we have to be careful. This is an ability we've never seen before. Watch out! He's coming!"