Kael
Deity
Is Flexible difficulty supposed to make you keep going up difficulty levels if you stay in the top 3rd? I had assumed that it was only supposed to move you up or down 1 level, but I've gone from Noble to Emperor.
I thought I'd read that Snowfall wasn't suppose to do cold damage to units with Winterborn, but it does. It is also odd that you can cast for terraforming purposes it in rival territory without declaring war so long as no rival units are close enough to be damaged.
Yes flexible difficulty will keep changing if you stay in the upper or lower third.
Winterborn units arent immune to snowfall (though their cold resistance will help). They are immune to blizzard damage.