The Strongest Violent Demon System

Chapter 2072 [Great sealing technique! 】1st update

As the fallen ancient city ahead collapsed overnight, it disappeared into thin air.

In Qin Tian's ears, the ethereal and nowhere-to-be-found sound of Monster System came.

[Ding~~The strongest monster upgrade system reminds the host: Successfully destroyed the ninety-three fallen ancient cities on the fallen planet and completed the side mission.\