Bets.

Returning to the tech race, I really liked this concept; I think it would be perfect for a fantasy setting. It could be a kind of parallel branch of technological development. http://ru.wikipedia.org/wiki/%D0%92%D0%B8%D0%BD%D1%87%D0%B8_%28%D1%80%D0%B0%D1%81%D0%B0%29,http://riseoflegends.com/worlds/vinci_units.htm