Hehehe. No I didn't mean that you didn't see my spell, but that Burnsaber seemed to have missed it.
Also mine does fatigue damage from asphyxiation, rather than physical damage. Though, it should be changed to AP rather AN, if it is to be used, or the damage lowered a little.
I like yours, too. I am imagining sudden, explosive expansion of the dissolved gasses in the water, dramatically compressing the water itself, and anything in it. None too realistic of course, but it's "magic".
(PS- I didn't ignore your request for another avatar change, I just wanted to give my baby his 15 minutes of fame before replacing him.
)