If he were to calculate things a little…tsk tsk, the Nightmare Clan’s ability to amass wealth was truly mouthwatering!

Qin Yu certainly didn’t know that it was for exactly this reason that the Nightmare Clan had argued for countless years but wasn’t able to change anything, and to this day the Nine Nether Pagoda still remained open to the outside world.

Demon crystals could move the hearts of people. If they didn’t, it was only because the number wasn’t high enough. After surpassing a certain limit, even Abyssal Demon Kings couldn’t disregard them.

Moreover, Qin Yu soon discovered that this soul tempering power had a drawback when it came to helping demons strengthen and temper their souls.

Soul tempering power was a flame. Using an incomparably crude method, it forcibly suppressed a demon’s potential in order to strengthen their soul.

The heat of the ‘fire’ would contaminate their soul during this process, causing their heart to speed up, and leading to a dry mouth and boiling blood.

Qin Yu finally understood why so many demons were willing to pay extra demon crystals to bring demon women with...