「Leaving that aside, I’ll be having you place Goblin Skeleton skulls, Rock Golems disguised as rocks and Wood Golems disguised as dead branches.」(Vandalieu)

All of them were objects that could be held in one hand. They were also things that would not be strange to find lying around anywhere.

If the【Appraisal】spell was cast they would be discovered, but surely nobody would go around casting this spell on every rock, branch and Goblin skull lying on the ground.

The mountain range was a place where monsters struggled violently to survive. Nobody would have the time to do that.

Well, there was a chance that a Golem or Undead would be unfortunate enough to be destroyed by a stray monster, but that was why they would be placed in sets of three. If one of them were to break, they simply needed to be replaced.