The magician targets a creature and immediately fills its lungs with water if air breathing or removes water from its lungs if water breathing.   The target must make a DC constitution check.   On a success the target can act as normal, although its next savings throw increases by one.   On a failure, the target takes one level of suffocation. For each level of suffocation:  

1. First level of Discombobulated Condition and psychic damage = 2x PB of magician
2. First Level of Shaken Condition and magical bludgeoning damage = 2x PB of magician
3. Second level of Discombobulated Condition (-3 instead of -1) and psychic damage = 3x PB of magician
4. Second Level of Shaken Condition (-3 instead of -1) and magical bludgeoning damage = 3x PB of magician
5. Third level of Discombobulated Condition (-5 instead of -3) and psychic damage = 4x PB of magician
6. Third Level of Shaken Condition (-5 instead of -3) and magical bludgeoning damage = 4x PB of magician
7. Final Level = Creature reduced to zero hit points (if it isn't already) and death throws commence

A creature that doesn't need to breathe is immune to this spell.