Vengeful Water creates assassination attempts on enemy commanders within your dominion. The assassin is a water elemental in heat or tempneutral provinces, and an ice elemental in cold provinces. There is a roughly 4-6 percent chance per candle in a province that an assassination attempt will occur. The size of the elemental depends on the terrain type:
Coastal provinces: size 6
Swamps: size 6
Sea is size 5
Noncoastal, nonswamp provinces with a river border: size 3.
Noncoastal, nonswamp provinces with no river: size 2