[Baalz]

How about a water battlefield enchantment (or global?) to reduce everyone's attack skill. In general this would make battles Last longer and thus let the encumberance advantage of LI be worth more. Of course, it would also accentuate the advantage of elite units...

Water should have some more good climate changing effects like Wolven Winter. I like the idea of a Very Powerful item which shifts the scale of a province to cold. It fits the theme and is similar to some other items. How about a Drout spell that shifts a province towards death? A combination of multiple Wolven Winters and Drouts would be a worthy gem sink in a lot of situations...