I understand that you have already collected the three run stones of the legendary warriors. We have been trying to collect those stones. for quite sometime now. I guess we had to wait until the right person came along.
Now, we have a much larger problem. There are four special rune stones that we must find. The four most powerful rune stones ever created, but you see, they are locked away.
I have a lead that I am working on, but before we collect them, we must release them from the ground where they are being protected... Hmmmm... I think you had better do some reading on this to better understand.
There is a librarian here in the city. Speak to him about the four rune stones, and I'm sure he'll show you a book. Don't worry, I'll pay you for your time. At this point, money is hardly an important factor. Return to me when you have gained knowledge for your next task.