Summons a rain of knives from the sky. The knives last just long enough for a strike and then they vanish.

Innate Attack (Impaling, Projectile) 1d [15] 
    Area Effect (2 yard radius) [+50%] 
    Overhead [+30%] 
    Persistent [+40%] 
    Environmental (Must be Outdoors) [-20%] 
    Magical [-10%] 
    Spell Components [-10%] 
        Must say "rain" in Latin 
Level 2 [20] 
    Increase Area Effect by 1 step [+50%] 
    Add Extended Duration (x3) [+20%] 
Levels 3-5 [26/32/37] 
    Increase Area Effect by 1 step [+50%] 
    Increase Extended Duration by 1 step [+20%] 
Levels 6-7 [39/40] 
    Increase Extended Duration by 1 step [+20%]