Of course, Roy was not stupid enough to devour souls openly during battle. If Xeron were to see it, he would flip out.
Therefore, Roy decided that it was best to use the system's storage function to hide the souls. It was both covert and swift, and Xeron would not be able to discover it.
After eliminating the AvLee elven village, the army marched on. Xeron rode on a tall nightmare warhorse, his mount, Mordika. This huge nightmare warhorse wore thick armor, and while walking on its four hooves, it left trails of flames behind it that took some time to extinguish. Xeron sat on his warhorse while holding his weapon, a black scythe. With thousands of demon troops escorting him, he looked magnificent.
Over the next few days, the army encountered more migrating elves, and whenever it met them, Xeron would explain the nature of demons to them.