143 Beat O' unyielding heart!

After more than ten minutes of running, the duo arrived at the peripheral of the high wall.

Mos was annoyed. Thankfully, this journey was just a straight line path. If the human had run amok, things would have become problematic. At the same time, he was secretly shocked at Shi Xiaobai's condition. After running at full speed for more than ten minutes, all he suffered from was being slightly out of breath.

Shi Xiaobai looked at the steep staircase in front of him and took a deep breath. At an extremely fast speed, he jumped onto it and arrived at the top of the high wall before he looked down.

A humongous white dragon was lying in the middle of four high walls, while a golden wing was covering the dragon's white body. Thousands of skulls were shooting red beams of light that converged at the dragon's chest, forming a gigantic outline of a heart.

That heart was slowly contracting and expanding. Nearly half a minute passed before it finished one cycle.