Skull Island was a former grotto-heaven like the Water Curtain Cave of Mount Flowers and Fruit, hidden in thin air away from the world.
According to the golden ape, the owner of grotto-heaven who might be a daemonic superior being was dead long ago, leaving some beasts and daemons that flourished… since Skull Island was almost a thousand kilometers wide and not that small, it was enough for those beings to live upon, especially with the concentrated Spirit Qi from the grotto-heaven.
The only drawback was that the grotto-heaven has been damaged, causing its Spirit Qi to flow out and be lost to the air. The daemonic cultivators therefore had a great obstacle when cultivating, and basically hit the ceiling at True Child-realm.
And the golden ape was one such daemon from the grotto-heaven.
