This causes the affected stones to briefly become much larger as they strike a target, while maintaining velocity.

Affliction [21] 
    Advantages [+48%] 
        Innate Attack (Crushing) 3d [4.8] 
            ST-Based [+100%] 
            Must Be Wielded (Anyone can use) [-30%] 
            Magical [-10%] 
            One Use Only [x1/5] 
    Malediction (As Regular Spell) [+100%] 
    Based on Activation Roll [+5%] 
    Area Effect (2 yard radius) [+50%] 
        Need this to affect multiple stones 
    Only Works on Stones [-40%] 
    Only Works on a Handful of Stones [-30%] 
        As many as can be held in one hand 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "boulder" in Latin 
        Must gesture with hands 
Level 2 [23] 
    Add Extended Duration (x3) [+20%] 
Level 3-7 [25/27/29/31] 
    Increase Extended Duration by 1 step [+20%]