This spell creat a bubble made of water around your opponent. Your opponent will be surrounded of water, and if he/she can't hold his/hers breath, he/she will drown.
The bubble can be frozen to ice, and when that takes place, the person in the bubble will be frozen to, and will go in torpid state.
Aqua bubble is a singel target spell, but if you creat two, you can combine them.
If the bubble is hit by lightning or elektricity, the person in the bubble will die.