Nahal's Reckless Dweomer

The signature wild-magic spell: the caster attempts to force a desired magical effect through raw wild magic. There is a chance the intended effect occurs, but otherwise it triggers a roll on the Wild Surge table, producing a random (often unpredictable, sometimes dangerous) result instead. Used by wild mages to cast spells not yet known or to power surges. Resolution requires the Wild Surge table; see source (Tome of Magic Wild Magic rules).