The next forest was pretty much the same as the deep forest near the castle. The monster here were generally between levels 10 and 15, with some monsters being lower or higher leveled, mainly cannon fodder or boss-type enemies. The enemies were the same as well, kobolds, hobgoblins, giant slimes, and the like infested the forest. They of course were no danger for Reign and the others, only wandering bosses and elites like the ogres could pose a slight challenge to them, while the field boss was the only enemy that could threaten them as it was a lvl 20 opponent.
They only fought a bit at the beginning of the forest, any enemy groups they encountered after that would simply flee once they channeled their mana outwards, creating suffocating pressure for weaker opponents. It was a neat trick that could save them a lot of time that they would otherwise waste while fighting low-level monsters.