Taking the Nightmare Sorcerer as its base, with the combined blessings of the Three-headed Snake Amulet that allowed for the True Elemental Body and his Magnetite Star Core, Grimm only had to fly out from the Three-Rings Magic Interdiction Boundary to easily escape to where Little Myna was. It was the reason why Grimm dared to stride into the closed space of the Shadow Argus Sorcerer Tower.
Grimm had made an initial self-evaluation of his own strengths.
Compared to some other Level-3 Sorcerers, there were still some shortcomings in Grimm's strengths. However, he was able to maximize his own advantages to a point where he would not lose, at least.
After all, the Academy War did not involve the legendary Level-3 Sorcerers that were hidden in the deepest regions of the Sorcerer Tower.