Oddly enough, this is often used by food mages to dehydrate food for rations.

Innate Attack (Fatigue) 1d [23] 
    Hazard (Dehydration) [+20%] 
    Area Effect (8 yard radius) [+150%] 
    Magical [-10%] 
    Spell Components [-30%] 
        Must say "wilt" in Latin 
        Must make hand gestures 
        Must hold a sponge 
Levels 2+ [+23/level] 
    Add 1d damage [+10 base]