This creates a free-floating ball of lightning between the caster's hands, about two inches across. Once created, it drifts on air currents until it comes in contact with anything solid or liquid. Then it explodes.

Innate Attack (Burning) 5d [75] 
    Surge, Arcing [+100%] 
    Side Effect (Stunning) [+50%] 
    Explosion 1 [+50%] 
    Delay (Triggered) [+50%] 
        Triggered by contact with solid or liquid matter 
    Drifting [+20%] 
    Melee Attack (Reach C, Cannot Parry) [-35%] 
    Environmental (Requires an Atmosphere) [-5%] 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "lightning" in Latin 
        Must gesture with hands 
Level 2 [89] 
    Increase Explosion by 1 step [+50%] 
    Remove Melee Attack [+35%] 
        Treat as Projectile-based 
    Add Reduced Range (x1/10) [-30%] 
Level 3 [104] 
    Increase Explosion by 1 step [+50%] 
    Reduce Reduced Range by 1 step [+10%] 
Level 4 [107] 
    Reduce Reduced Range by 1 step [+10%] 
Level 5 [109] 
    Remove Reduced Range [+10%]