Reavers and the forces of nature have never really gotten along. In
particular, the often heavily-armed and heavily-armoured reavers find deep,
flowing water a daunting barrier. While most would find a bridge, try to swim,
or learn to fly, the reaver way is far more direct. With this spell, a reaver
can drastically lower the water level of his surroundings, making it possible
to cross rivers or even oceans without getting in over his head. The drain of
the spell on the caster increases with the amount of water destroyed.
Syntax: cast destroy water
        cast destroy water at <direction>