Saric's Threads of Confusion
Transmutation  [Meta-magic]
Level: Sor/Wiz 7
Components: V, S, M
Casting Time: 1 action
Range: Personal
Target/Area/Effect: 10 ft./level radius emanation
Duration: 1 round/level
Saving Throw: Will partial
Spell Resistance: No
An invisible field surrounds you in all directions, confounding your enemies attempts to use magic by twisting the fabric of magic in the affected area. Each time that a spellcaster, other than you, attempts to cast a spell from within this field, they must make a Will save or their spell fizzles, expended. One Threads of Confusion spell cancels another automatically.
    Material Component: A ball of thread, knotted many hundreds of times.