Synopsis
cast 'deja vu' [<victim casting a spell>]
Description
Deja vu is a phenomena familiar to everyone, the sensation of perceiving an experience as having already happened in the past- but some master mental manipulators are capable of harnessing it and causing it intentionally.
Casting deja vu on a victim that is mid-spellcast will cause them to relive the spell they cast most recently, with the same targets. Only legal spellcasting can occur, of course, but the most inventive psionics have proposed all manner of uses for the spell.