```
"Is this... the forbidden land where you obtained those heavenly treasures?"
Standing before the incomplete Five Elements Formation, the crowd gazed at the light gate with unparalleled surprise. The Elder of Heavenly Medicine asked in such a way.
"It is," Lu Chen nodded and said, "I will take you in first. You will surely have your eyes opened! Moreover, this place is extremely safe!"
While speaking, he looked towards the stone wall, where the Night Spirit Pearl faintly shimmered with spiritual power.
Under the Hateful Heaven Pupil Technique, Lu Chen could clearly see that this indeed was the external key to the Five Elements Formation!
The key to a formation is known as the formation key!
"Do you mean to say, we should take down this Night Spirit Pearl?"
With his extensive experience, the Elder of Heavenly Medicine naturally thought of this possibility.
"Exactly," Lu Chen smiled and said, "And Xiao Hei is still inside; I wonder if he has made a breakthrough yet!"
