Control (Spell Modifiers) can control a specific spell up to 10 times level squared points, adding or removing 10% worth of modifiers per level.

Control (Spell Modifiers, Occasional) 1 [24] 
    Persistent [+40%] 
    Extended Duration (Permanent) [+150%] 
        Applies to Persistent 
    Extended Duration (x3) [+20%] 
        Applies to how long the caster has the ability 
    Reduced Time 1 [+20%] 
        Free action to affect spells, but doesn't apply to casting time 
    Only to Reduce Takes Extra Time [-80%] 
    Can Only Affect the Caster's Spells as They're Cast [-50%] 
    Magical [-10%] 
    Spell Components [-30%] 
        Must say "alacrity" in Latin 
        Must gesture with hands 
        Must hold an hourglass ($5) 
Level 2 [+16.5/level] 
    Add Control (Spell Modifiers, Occasional) 1 [+15 base] 
        Doesn't Increase Modifier Value [-50%]