Champion suggestion (Master Arcanist)

I have been thinking for the past couple days about a champion I think would fit very well into the league of legends champion roster. A champion that is a master of the elements who could be played as a mid laner.

Abilities

-(auto attack) A magic missile that would have a decent range and not very high damage

-(Q) A fire bolt skilshot that would have a small AoE when it hits

-(W) A water spell that would act like Nami's Q like a water prison that does damage in the air like a suffocate

-(E) A small crescent shape rock wall that would block movement in that direction

-(R) Empowers all abilities for 5 seconds giving extra effects to the abilities such as the fire bolt becoming 3 bolts that go to the point the cursor is located like Heimer's W, the water prison would affect a large area and could hold more than one champ, Rock wall now spreads wider but gets a health bar similar to Yorick's W

-(passive) Leveling an ability to max would give it the bonus affect from the ult but the ult would just increase damage of that ability when activated.