I know this is a little obvious but how about using Drown?? what is that like a 4th level spell??
That way you just summon the water directly into there lungs.
Did that with a Darfellan cleric of Procan to some other darfellan fighter that was already under water. There where holding there breath (which they can do for 8*Con rounds) but that doesn't help much when the water appears directly in your lungs. None of them had any ranks in heal to stabilize him so 3 rounds later he was dead ; )
That way you just summon the water directly into there lungs.
Did that with a Darfellan cleric of Procan to some other darfellan fighter that was already under water. There where holding there breath (which they can do for 8*Con rounds) but that doesn't help much when the water appears directly in your lungs. None of them had any ranks in heal to stabilize him so 3 rounds later he was dead ; )