Hunting level four ordinary undead was primary hunter's favorite compared to other beasts. Undead's would chase on instinct. Its enough to use simple traps to kill them unlike other monsters which have cultivated beast-like sense of survival. Even the 'bone rats' knew how to avoid dangerous situation and were pretty difficult to capture using traps.
However, it had to be noted that ordinary undead would evolve into a skeleton after going through another mutation. After heavily consuming and reaching the new level, all of its capability would leap up and upgrade. It would reach a level where it could directly fight head on with an intermediate silver level hunter. Moreover it would have a sense of consciousness and would not be easily killed by external forces.
Dudian had previously seen a skeleton's corpse in the area no 1. At the moment, he could easily distinguish this once as ordinary undeads and that's why he dared to hunt them using traps.
Whoosh! Whoosh! Whoosh!