Trunel Woods was unofficially divided into three areas.
The outer area, where Arthur had fought the Bone Blade beast before.
The Middle area where the Black Root Hemlocks were found and then finally the inner area where the Hideout of Dozla was.
The difference in the areas also meant that there were different mobs that one would come across. For the outer area, it was mostly Bone Blade beasts though they could also be found in the middle area.
But the main enemy in the middle area were none other than Trunel Orcs. One could find them wandering around, either alone or in small groups. They would also hunt other animals for food thus, players would encounter them often.
Though if they came across players, the Orcs would be fine considered them as prey too. Thus one needed to be careful when entering deeper into the woods.
If a player was unprepared and they stumbled into the deeper parts, they could very well end up dying.