C1489 Powerful Ancient Mystery

"Key?"

Huang Chang and Guo Jie stared at the Rainbow Dragon Bone and exclaimed at the same time.

"That's right. Although it is a bit strange, it is indeed a key.

If my guess is right, this has something to do with the dragon gate.

Since it was a door, perhaps there should be a key that could open it.

Of course, even if it's not the key, it's still an extraordinary treasure