The water ultimate seems very very powerful...

It takes me from 233 hit points down to 70 if I stand inside of it. I am wearing 110/sel level robes that have decent magic resistance.

It has a long recast time, I look forward to getting in this afternoon and using it on mobs and other people to see the effects.

If I drop this on you as it currently stands, you have to focus on getting out of it, not fighting me. I love that.