“Only one of the four great treasures remains free from contamination... and it’s the sword I saw just now?” Lu Yun asked reflexively.

“That’s right!” Ashu nodded. “If my guess is right, the corpsefire we saw earlier should belong to the great one buried in the ancient tomb of Crimson Province. It’s on the same level as the Dusk River, but it’s turned into corpsefire after its corruption.”

Lu Yun shuddered and heaved a mental sigh of relief.

The corpsefire outside the Heaven Locus Marsh wasn’t the main body of the corpsefire—it was just a bit of energy that’d leaked out. Though Lu Yun’s hellfire could counter dead things, he wasn’t strong enough to fight off the main entity of fire given his current strength.

More importantly, someone else was controlling the fire.

“The sword beneath us is being corrupted by the extreme yin in the Dusk River....