Hexplosives Expert

Mobai's apology was very sincere, and he did appear to have taken appropriate measures prior to the experiment. He had set up three magic shields, and kept the dosage of materials the same, but he had added… some powdered beast core?

An explosion of that caliber was impossible to set off without a sufficient amount of explosives. From the crater at the center of the forge, it could be deduced that Mobai had been conducting his experiment at least 500 meters below the ground.

The fact that the explosion was still able to cause such massive damage despite occurring so deep underground was a testament to its power. The explosives created by Mobai were clearly incapable of producing such devastating effects, which indicated that the powdered beast core that he had added was crucial.