"Stay back a little while I check this area." Onyx was the one taking the lead. Not because he was entirely worried about the dangers, but because if there was a danger he wanted to be the one that took on the danger himself. He knew that if one of the younger sperents was harmed that it would break the morale of everyone.
He also was using his high ability to sense the dark and light mana around. He could feel the balance was very unique in comparison to any other place he had been. the flow of light mana was directing pushing back against the dark mana. One side had a pillar of stone that cast a shadow entirely.
The other pillars of stone which stood high would only cast their shadows in a similar direction. Making a naturally occuring circle of shadows depending on the time. But part of those areas was always in shadow which allowed for the accumulation of dark mana.