The five level 3 trees were set up in a pentagon structure at first, surrounding the mother tree in the middle of it.
The structure would change every time that Tianlong Yun took down one of those trees, as they always tried to protect the mother tree from the enemy.
So, Tianlong Yun and his disciples had to take quite a roundabout way, but still, he finally managed to reach here.
Now that all the level 3 trees had been cleared in the surroundings, the pressure into what had previously been the Nightmare Forests was already at 50%.
Even though Tianlong Yun and his army had cleaned the outer area of any possible tree, the pressure still remained in the prior area.
Most probably that was the area that the mother tree could spread its pressure, and one had to accept that it was a terrifying one.
After all, with the earlier pressure, even light particles couldn't be found in these places, making it a pitch-black abyss.