C552 Zhang Xi Had Left

"Great treasure!"

I tried calling out, but no one answered, not even an echo.

I thought about it and reached into my backpack to take out the yin-yang knife.

Zhang Xi was a dead ghost, if this place was truly the Underworld, he should be the most familiar with it.

Moreover, he was even more reliable than the two old ghosts, Old Ding and Zhang Ande.

However