Those are … devil souls!
Zhong Yue looked down, around the black coffins were giant devil souls levitating, they traversed across the coffins as they were non-physical entities. They were precisely the devil souls he once saw in the dark haze!
In the round pit, devil souls were as numerous as the number of coffins that laid in it. Zhong Yue had a rough look and estimated there to be at least 2000-3000 coffins in the round pit!
That meant there was also a matching number of devil souls!
Thousands of gods and devils had died here and were sealed by the gods, what is all this? Why is there a sword inside the Swords Gate Mountain, why is it piercing the heart? And whose heart would this be?