"Vast, sweeping... Generally, Megidolaon can strike large groups of enemies with ease, and next to nothing can resist its power." But... hm. Perhaps it'd be easier to demonstrate what a Persona is than explain with words.

He normally doesn't summon outside of battle, but... "As for the source of my power... Come, Hereward."

At his command, a tall, muscular archer clad in black and red appears, though he makes no move to attack.