Ep 7. Orphen - 07 - The Ruins of Baltanders

Orphen and the gang decide to go to the ruins of Baltanders. As they get there, they find the same symbolic language that appears on the sword, but its not only on the walls. They find the symbol on a giant rat that had been transformed by the sword. Orphen then retrieves an object he left behind when he was younger. What was the object? Why is there a giant rat?