"So, your true purpose is to have me collect the Innate Five Elements True Fire, so that the Netherworld Ghost Insects can break free from the seal, right?"
The Netherworld Ghost Insects were suppressed by the Innate Five Elements True Fire, and only when the Innate Five Elements True Fire disappeared could the seal be lifted, and the Netherworld Ghost Insects break free from it.
"Exactly, from the moment you entered the Sealed Land, This Seat noticed you."
Ming Jiu said, "Long Yan, you are a Nine Suns Inheritor, and only you have the ability to tame the Innate Five Elements True Fire. So, This Seat gave both the Five-Colored Key and the Five-element Energy Seeds to you, and gave you the treasure of the Qing Emperor Dojo. You did not disappoint This Seat."
The Five-Colored Key is what he placed in the Red Emperor Dao Field, prepared for Long Yan.
"As I thought!"
