This is targeted via the Innate Attack (Gaze) Skill.

Binding 12 [65] 
    Area Effect (2 yard radius) [+50%] 
    Persistent [+40%] 
    Extended Duration (Permanent) [+150%] 
        Destroying the webbing ends the spell 
        Burning it or cutting through works 
    Environmental [-30%] 
        Requires two surfaces to stretch webs between 
    Magical [-10%] 
    Spell Components [-30%] 
        Must say "web" in Latin 
        Must gesture with hands 
        Must hold a bit of spider web 
Levels 2+ [+12/level] 
    Increase Area Effect by 1 step [+50%]