Lin Dong raised his eyes and looked towards the blood-colored forest not far away.
The outskirts of the blood-colored forest were shrouded in a layer of blood mist.
Lin Dong continued to approach, discovering that outside the blood-colored forest, there was a blood-colored barrier.
It was a formation-formed barrier.
"This formation is extremely ancient, named 'Blood Realm Firmament'. It serves both as a guardian and a seal, categorized as a Level Six Formation."
"It's not a killing formation, but its protective and sealing power is incredibly strong. Even Heavenly Realm martial artists cannot forcibly break through its barrier to enter inside."
"In ancient times, it was often used to seal those extremely powerful beings. Even Four-Star or Five-Star Demon Emperors could be sealed!"
Upon seeing this formation, memories surfaced in Lin Dong's mind.
All these formation-related things were acquired by Lin Dong through the inheritance from the 'Hidden Dragon Superior'.
