It's not loopholes, its Tanistry which is an early form of democratic leadership selection used by most clans in Scotland although it was ended in the early 15th century so it's probably a mistake by the original author to include it. Also the game being played is Shinty which is one of the oldest contually played…

This is a show that anyone who watches seems to fall in love with. I suggest it could be the next Breaking Bad where a lowburn series becomes mainstream and talked about non stop. Why wait for the threat of cancellation to big up your favourite show? Tell everyone you know to watch Reign *now*.