No one did come beside the call.
But then someday, the medallion felt a human soul near. He exulted with the joy of finally finding a new wearer. But little did he knew that the human was simply someone driving a bulldozer to clear off the old ruins in which the medallion was and wasn't even aware of the medallion call. And so both of them were surprised when the bulldozer passed over the medallion, breaking it. And as he was broken in piece, the medallion freed an extraordinary amount of magic that caused an huge explosion that blew off the ruin.
And it also brought back magic to this world and began to slowly change some of it's people to fit their nature. Well, this wasn't noticed until the first "changed" who was to be...