This imposes a -10 to all rolls to track the target through any area in which the spell was functioning. This doesn't work like other versions of Obscure, by actively jamming a sense. This instead causes the target to leave less evidence of their passing.

Affliction [64] 
    Advantage [+500%] 
        Obscure (Tracking by Foot Prints) 10 [50] 
            Stealthy [+100%] 
            Extended (Tracking by Infravision) [+20%] 
            Extended (Tracking by Scent) [+20%] 
            Extended (Tracking by Damaged Plants [+20%] 
            Magical [-10%] 
    Malediction (As Regular Spell) [+100%] 
    Based on Activation Roll [+5%] 
    Takes Extra Time 2 [-20%] 
    Magical [-10%] 
    Spell Components [-40%] 
        Must say "no tracks" in Latin 
        Must burn and scatter the ashes of an evergreen sprig 
Level 2 [69] 
    Increase Malediction to Speed/Range table [+50%] 
Level 3 [74] 
    Add Area Effect (2 yard radius) [+50%] 
    Add Selective Area [+20%] 
Level 4-7 [79/84/89/94] 
    Increase Area Effect by 1 step [+50%]