Rumble...
When the Thunder Pool was completed, the nine thousand worlds within it suddenly shook simultaneously. An unknown force burst forth, turning into a single stream that blasted towards the deep void.
With a loud bang, the force penetrated through the layers of the void and entered the Thunder Marsh.
Crack! Crack...
In the void, a terrifying black hole quietly formed. The boundless thunder light burst within, like a vast ocean, consuming everything.
This is the Ancient Thunder Swamp, the ultimate sacred place of the Thunder Dao. With the formation of this black hole, countless thunder lights poured out and submerged into the Thunder Pool.
This was the Thunder Marsh's gift to the Thunder Pool, using its own supreme Thunder Power to wash over the pool, allowing it to complete its transformation and obtain the qualification to ascend to a Quasi-Saint level Divine Artifact.
Roar...