C2440 Metamorphosis of Demon Coffin

The black knife was extraordinary.

It was a treasure bestowed to Medicine King Gu by his Tiancang God Country, which allowed his to defend himself.

When Cheng Feng obtained it, he did not put it to heart too much.

But after a long time of studying, Cheng Feng realised that the blade contained a supreme Power.

Compared to the False Supreme Artifact