Under the cliff, two doors leading to two different kinds of worlds had opened, and each of them had their own restraints.
It wasn't the first time the two people had met, and it wasn't their first time clashing. They had fought in the past, in the period that High Emperor Era was about to be buried.
After that, they had fought numerous times, but it had been Founding Emperor Era by then!
At the mountain cliff, they had fought numerous times.
Both of them by then had left the desolate world, and it was merely their apparitions that were fighting. Their realms were too high and their abilities were too strong. If there wasn't an opportunity, their true bodies couldn't enter this world.
There were no more lifeforms in this world and nothing else that could survive here.
It was the Great Ruins of High Emperor Era.
A place that was even harsher than Founding Emperor Era's Great Ruins.