This Talisman Paper had lain untouched for so long that almost all its energy had faded. Even Emperor Xuanwu had been unable to find what was hidden inside.
But the instant Qin An infused it with Void Essence, a faint anomaly finally appeared.
Qin An sensed a wisp of energy moving within the Talisman Paper, hidden in its deepest recesses.
Without his strength at the peak of the Selfless Realm, he truly would not have sensed what the Talisman Paper concealed.
That wisp was the energy of the Mysterious World.
Through the Talisman Paper, the Mysterious World's energy seemed to mark a set of coordinates. Qin An could sense them clearly.
"Did you feel that?"
Emperor Xuanwu noticed the change in Qin An, too. When Qin An sensed the energy, it had given him an immediate response.
Though Emperor Xuanwu had only just entered the Selfless Realm, that response let him detect the wisp's existence as well.
Delight flashed across Emperor Xuanwu's face. He knew that with this energy, they could follow the coordinates it provided and find where the letter paper had been sent from in the Mysterious World.
They might even use the letter paper to send a message back.
Qin An nodded. "That's right. The energy I sensed can serve as coordinates."
Qin An withdrew his Void Essence from the paper, then looked at Emperor Xuanwu.
After a moment's thought, Qin An added something else.
"Next, we should discuss how to send a message over, and what that message should say."
The wisp of energy was exceedingly faint. One transmission would exhaust it completely.
Once it vanished, they would never find the coordinates of that part of the Mysterious World again. Nor could they use this letter paper to send their message there.
That made deciding what