C617 The Black Mountain Evil God

The Yin Gathering Array was the place where the Yin Qi of Heaven and Earth was gathered.

No one could test the Yin Gathering Array, but Zhang Yang was sure that it had existed for many years, because the ancient tree just now was at least a hundred years old.

This ancient tree was the base of the array.

In other words, this Yin Gathering Array had existed for at least a hundred years.

However