Innate Attack (Corrosion, Projectile) 1d [23] 
    Area Effect (4 yard radius) [+100%] 
    Overhead [+30%] 
    Persistent [+40%] 
    Environmental (Must be Outdoors) [-20%] 
    Magical [-10%] 
    Spell Components [-10%] 
        Must say "rain" in Latin 
Level 2 [31] 
    Increase Area Effect by 1 step [+50%] 
    Add Extended Duration (x3) [+20%] 
    Add Increased Range (x2) [+10%] 
Levels 3-5 [39/47/55] 
    Increase Area Effect by 1 step [+50%] 
    Increased Extended Duration by 1 step [+20%] 
    Increase Increased Range by 1 step [+10%]