[quote=@ImportantNobody]
I wonder what would happen if Evvie retreats to the big island. Would Anna want to follow her there? If they both stick to the area of their advantage then they may end up in a staring contest that never ends.
[/quote]

She probably wouldn't follow her further than 100 feet from a large body of water, as that's her control range.

So it probably would turn into a staring contest.