Torn, ripped or mangled, regardless of the method of spellcasting, your touch thereupon alters the weave. Choose one creature or magical object that you can touch and is restrained, as long as you maintain concentration, the creature's connection to the the magical weave of Mystra is severed. The effected creature cannot cast or concentrate on spells.

If you concentrate on this spell for the full duration, the effect becomes permanent and nothing less than a wish spell or divine intervention could potentially reverse the effects of this spell.