Summoner Belinda:
I've been waiting for you. While you were away I did some research! I've located the fifth Stone of Commune, but unfortunately, it's already lost its power. You must've felt this Stone of Commune. Didn't it feel weaker than before?
Fortunately, there are two more Stones of Commune like that one. One is in the Imperial Tomb and the other is at the Wall of Argos. If you go to the Imperial Tomb, look in the Four Sepulchers near the center. If you go to the Wall of Argos, enter the Shrine of the Loyal at the northeastern end of the wall. And...
"And...?"