The term "roll the bones" came from the old Norse tradition of performing augury via runes carved into bone - usually the horns of a great stag. Much was lost when Christianity was forced upon Scandinavia. Scrolls, books, epic sagas and artifacts of the old Gods were burned. No one alive today has the deep old knowledge of that tradition, culture and faith. It's a damn shame, for some of us with that blood often wonder what it was like.