Oh yes it does. [ He'll hold out his good hand, palm up and a ball of water forms. ] A bit of both, really. You draw if from the air which is why it takes so much energy to do so. Air doesn't have nearly as much water as a an ocean. So that's why it takes a good deal more to use such a spell. Also because you're not as used to doing it and well as you said mechanics and the like. You could always try to combine filial magic too. But that's a bit more complicated.