Undead Emperor was given a lot of information about Han Sen by the other spirits, so his expectations had already been realistically set. The spirits called upon Undead Emperor to help slay Han Sen due to his undying body, but just like always, the results shocked them.
The previously-thought-to-be-indestructible body of Undead Emperor was utterly annihilated by Han Sen's slap.
Mankind had won that round, as well. And after Han Sen claimed the mountain, humanity began to celebrate another job well done. But all of a sudden, a light shone in the sky high above.
The ground began to shake, quake, and rumble. Tears formed across the region, through subterranean explosions. It was like a coming apocalypse, and it frightened the onlookers.