She, being of a much higher intelligence quotient, was able to see behind the smoke and mirrors, and saw directly through the working principle of the box. Her brilliant, battle-tested mind deciphered everything within a short time. Her hypothesis was simple enough. Mina figured out that the mana wall which had the box had created was not static.
It appeared an automatic sequence had been put in place which afforded it the flexibility to adjust according to the amount of mana invested in it. Basically, its resouce as a defensive artifact was greatly influenced by the strength of the attack. It was innovative really, in the sense that it was fundamentally different from ordinary mana barriers. It was much smarter, like an artificial intelligent computer.
