We need a Plague Mage

Throws around disease and infection. Builds AP, but deals physical damage.

One form of attack causes disease to spread across adjacent units over time. Think of it as a cross between Malzahar's malefic visions and Sivir's ricochet.

Another form of attack causes infection that applies DoT and grievous wounds. Think of it as a more interesting variant on Gangplank's grog-soaked blade.

Applying slows, blinds, and vulnerability to physical damage would be thematic as well. Blind is a highly under-utilized form of CC, so more of it would be a good thing.

Hmmm, this champion may be better as a support. Sort of the anti-Soraka.