At the end of the third passage.
The stone wall was indeed extraordinary; despite the commotion outside, Qin Chen, inside, couldn't hear anything at all.
"Refine!"
Qin Chen unleashed his Devouring Elemental Power and began to frantically devour one Invisibility Crystal Stone after another.
Qin Chen could also distinctly feel the concentration of his Invisibility Talent rapidly increasing.
Devouring Invisibility Crystal Stones allowed for a much faster enhancement than when Qin Chen initially devoured the Inner Crystal of an Invisible Demon Snake.
One hundred!
Five hundred!
One thousand!
The number of Invisibility Crystal Stones continually decreased.
The concentration of Qin Chen's Invisibility Talent also kept rising, making his blood slightly boil.
This sensation of rapid improvement was indeed thrilling.
Fifty percent!
Sixty percent!
Seventy percent!
