First, the monster will clear a path. With the mentality of a normal Adventurer, they will always move on this path. The reason why this leader monster did this was because in the past few days, Kain had not shown the depth of his vision to the outside world, instead, he only showed himself as a destroyer with great power. This was a rather disastrous misunderstanding. But it also benefits Kain.
However, the monster was still extremely careful, that safe path was not something that was presented to him, but required him to have the ability to observe and search to find that path.
This is of course also a trap, moreover a trap that targets intelligent people.
For those who are prone to worry, to put it bluntly, they are skeptical. They will not believe what is presented so easily before them, especially in this situation, after going through so many obstacles on the fifth floor, suddenly there is a clear path ahead.