Summoner Belinda:
I've been waiting for you. While you were away I did some research! I've located the fifth Resonance Amulet, but unfortunately, it's already lost its power. You must've felt this Resonance Amulet. Didn't it feel weaker than before?
Fortunately, there are two more Resonance Amulets 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 Loyalty at the northeastern end of the wall. And...
"And...?"