The Shadowmancer kept materializing more and more Shadow Monsters and it was only a matter of time before more than a hundred thousand seemingly immortal monsters had been materialized. Dexter could easily control them and he ordered them to kill every single hostile being in the proximity.
The Shadow Monsters turned into the Orion Shelter's first line of defense while Ryu, Tyrant, Kaeldur, and Erio were wreaking havoc in the midst of the enemy troops. Nial clearly perceived what his Devils were doing and he couldn't help but smile proudly upon seeing how they were fighting together as a team.
His Devils and Ryu were doing an exceptional job in eliminating the millions of monsters that were charging at the Orion shelter.
Of course, it was not possible to restrict every single monster from passing through the lines of defense but hundreds, if not thousands of dungeon beasts were dying every second, but that was not necessary, to begin with.