The caster conjures a type of evil weather.
It functions as described in Chapter 2 of this book, except that area and duration are as given for this spell.
To conjure violet rain, the caster must sacrifice 10,000 gp worth of amethysts and spend 200 XP.
Other forms of evil weather have no material component or experience point cost.
Corruption Cost: 3d6 points of Constitution damage.