How Strong was Saint Zi Yan?

"Black and white ashen flames, mystic flame transformation!"

In an instant, the black-and-white ashen flames attached themselves to the Nine Nether Weeping Blood Sword.

Lin An easily split the bat monster's energy flow and slashed the sword at its neck.

The bat monster quickly swung its spear to block the strike, but Saint Zi Yan's energy flow overpowered it. The monster's body was engulfed by the surging golden light, and it quickly lost its ability to resist.

Lin An quickly flicked the monster's spear away and stabbed the Nine Nether Weeping Blood Sword into its heart!

Abruptly, bright red life energy flowed along the slender blade of the sword towards the transparent white crystal. 

The life energy upgraded the Nine Nether Weeping Blood Sword, and the energy waves it emitted suddenly became stronger.

Lin An immediately understood that the sword was close to advancing to the late stage of the foundation establishment level.