Essence of Air

Air can be merged with the essence of a mortal, and doing so can impart tremendous abilities, albeit at great risk to the caster. You mix with the wind itself and become insubstantial. You may not interact with any physical objects while insubstantial, although you do remain on the ground, you may pass through solid objects at a rate of one foot per round. You Water Ring is considered halved (rounded down) while you remain insubstantial, and you may not cast any other spells until you return to solidity.