C677 Walking out of the Emerald Woods

"What is this thing?" Di Wuya picked it up, "This is called a Communication Stone. It can communicate with people. From the looks of it, it can only be used for one sentence. Good stuff. It can be activated with magic power and then it can be used to send a message to the stone in your hand. However, once it is used, it will be useless. It's strange that they don't bring a Communication Stone