Mordenkainen's Involuntary Wizardry

This spell forces a single, randomly-chosen wizard spell from the mind of another spellcaster. If the subject can't cast wizard spells, then the involuntary wizardry is wasted. Otherwise, the subject receives a saving throw vs. spell with a -3 penalty; if this succeeds, the involuntary wizardry spell is wasted without effect. The involuntarily cast spell is centered on and takes full normal effect on the subject; if the spell would do no harm to the subject, then the subject suffers one point of damage per spell level (for instance, detect invisibility, a 2nd-level spell, inflicts two points of damage). The involuntarily cast spell is expended. The subject receives any saving throw normally allowed against that spell's effect.

While Mordenkainen's involuntary wizardry spell itself has no material component, any component for the involuntarily cast spell is expended from the person of the subject. Likewise, any casting penalty (such as the temporary Constitution toss for an identify spell) is visited upon the subject.

Notes: Rare or very rare spell. (Updated from Dragon Magazine.)