Idea for a Champion

I had a cool idea for a Mid Laner Champion, I'm sure it needs some polishing but here's the idea: . . . .

The Elementalist

Passive: Reduced cooldowns when standing in a puddle or river

Q: Fireball - Launches a fireball where clicked, if the fireball hits an enemy it deals burn damage, if the fireball hits a puddle or an enemy in a puddle it creates a steam cloud that deals DoT in an area and dries up the puddle.

W: Lightning - Lighting strikes where clicked and deals damage to the enemy and the closest enemy champion to him for reduced damage, if the enemy hit is standing in a puddle he is stunned for 2 sec and dries up the puddle.

E: Rain - Creates a puddle in a small area where clicked reducing enemy magic resist and slightly reduces movement, puddles can be linked to cover more area and deals extra damage for every puddle linked, puddles last 10 seconds.

R: Storm - A storm creates many puddles on and around the champion selected, and you get reduced cooldowns for a short time.