Just as Wang Baole lifted his head, and the stone door opened, the soil above them began to shudder and part. A gigantic tear appeared. The Sea of Fire surged in from above, like a fiery waterfall!
The underground cave was significantly expansive though, so the Sea of Fire would take some time to fill it completely. However, with the gradual and continuous collapse of the ancient battlefield, it wouldn't take long before this entire place became flooded with the Sea of Fire.
Of course… Wang Baole wouldn't have batted a single eyelid if it were merely the flooding of the Sea of Fire. His face swiftly darkened though, as nine Spirit Boats dove in alongside the Sea of Fire through the large crack. They swam through the Sea of Fire and appeared in the underwater cave. The Spirit Boats shone glaringly as nine Core Formation realm cultivators from the Vast Expanse Dao Palace appeared suddenly.