This scenario starts out as two separate games, one on each half of the board.
Starting at the end of the third round, there is a possibility that the glaciers will melt, flooding the lowlands and joining the two sides of the board. The odds of the melt/flood increase each round.
When the glaciers melt, any figure on a level one (or lower) space is destroyed. Once the two sides are joined, all remaining players continue
until only one player is left.