Obscure (Hearing) 10 [43] 
    Variable (Area Effect) [+5%] 
    Ranged [+40%] 
    Stealthy [+100%] 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "silence" in Latin 
        Must gesture with hands 
Level 2 [57] 
    Add Area Effect (4 yard radius) [+50%] 
        Builds on built-in 2 yard radius 
    Add Extended Duration (x3) [+20%] 
Levels 3-5 [71/85/99] 
    Increase Area Effect by 1 step [+50%] 
    Increase Extended Duration by 1 step [+20%] 
Levels 6-7 [103/107] 
    Increase Extended Duration by 1 step [+20%]