When Price returned to their camp, he reported his findings about the Floor's situation. The Boss was killed, most likely by Jarhuth, but there were still many other Trolls remaining.
Unlike when Players go up a Floor using the stairs, which get them in a random spot on the Floor when an Evolved Monster gets down, it appears right at the stairs. Since it was usual for the Bosses to be near the stairs, it was inevitable for the two to start a fight with each other.
The Boss on this Floor was a Troll, but it wasn't too challenging to fight it. If it was alone, it was a typical Troll, which all you needed to worry about was its Regeneration, but you could disable it for a limited time using Fire attacks.