C2718 Buried Skies Coffin

After the Buried Heavens Coffin fused with these tombstone fragments, its aura instantly soared several times over. Even Niu Thirteen couldn't help but be surprised.

"The Buried Heavens Coffin can continuously evolve. As long as you swallow all sorts of materials, you can continue evolving. These tombstone fragments are extremely hard. After melting into the Buried Heavens Coffin