C6155 The Black Blood Old Demon's Furnace!

At the same time, the strength of the Black Blood Old Demon would also be greatly improved.

In the Furnace, the one who benefited the most was the Pure Yin Furnace. The Pure Yin Furnace itself needed a virgin's body.

Moreover, it also needed a special aptitude to cultivate with the Black Blood Old Demon in Yin and Yang.

After that