Thirty-Six Streams of Light (End of This Arc)

Master Yuan Chu, the blue-robed elder, nodded. "Back when I was still a Venerable, I entered the Cave Heaven Flying Boat and witnessed all manner of extraordinary things within. Some were even more inconceivable than the Six Paths Heavenly Wheel and the Lake Heart Island Ruins! Even then, I believed the creator of this Cave Heaven Flying Boat was stronger than the Lakeheart Island Master and the Devil Ancestor. I guessed it must have come from an outside universe."

"Indeed." Lord of Time-Space Island, clad in black robes with black hair, also nodded. "Unfortunately, while it is remarkable, it is difficult for us to gain any benefits from it."

The five great ruins.

Ranked third, the Cave Heaven Flying Boat was the stingiest of them all. Entering it to explore made it difficult to reap any rewards.