This was an idea I had while reading part of Leviticus.
Year of Jubilee
Good Dominant
Return all cards in set aside areas to owners' hands. Return all cards in territories to owners' territories. No player may attack his next turn. Each player draws one on his next upkeep phase.
Leviticus 25:8 Count off seven Sabbath years—seven times seven years—so that the seven Sabbath years amount to a period of forty-nine years.
Basically, every seventh year was supposed to be a Sabbath year. No one was supposed to do any work, and God would provide.
After seven Sabbath years - so every fifty years - there was the year of Jubilee. After the seventh Sabbath year, there would be another year with no work, and God providing even more than the previous year. In the year of Jubilee, all debts were forgiven and all loans returned. (There is actually no record of this ever being observed in Israel, however).