Inside the hill.
Grey didn't need to worry about being harmed by the array. With his proficiency in arrays, the chances of him being trapped or harmed here is almost zero. Adding the fact that he is aware of how to safely pass through the seal, he didn't have anything to fear.
He followed the hidden array lines, using his vast mental energy to sense the presence of the invisible line containing energy that gave this place the mysteriousness it currently had.
From the day Grey was introduced into the world of array formations, he fell in love with it and had done everything he could to learn any new array formations before him. The current array formation he was exploring was different from what he knew. Despite the differences, he could still sense the familiarity with it and some of the old arrays he had studied. Most of the old array formations Grey had studied were generally hidden in secret worlds like these.
