Thunder Hell Emperor

Han Sen used the Night Cloak every night to sneak into Thunder Hell Shelter. On the sixth night of doing this, he found a reduced number of super creatures and king spirits in the Thunder Garden. Understanding this, he knew the time to strike was now.

He swiftly returned to the underground shelter, and with everyone gathered around, he formulated a plan that would enable him to retrieve the spirit stone.

Han Sen had been watching the proceedings of the garden for two nights. He wanted to ensure Thunder Hell Emperor had indeed gone and taken a hearty-sized posse of his best with him. If the spirit was gone, Han Sen would wait until the emperor had crossed a great distance and a quick return would be impossible.

After Han Sen was able to confirm he was gone, things were looking up. Still, he couldn't yet determine what would await him in the spirit hall. If he went inside, the Night Cloak wouldn't work. It was a one-way ticket.