Like an actual DoT poison based mage champion built around doing poison DoT to enemies and slowly killing her victims.
**EDIT: **To all of those saying Singed or Teemo
Singed is a Tank and is not very reliable with poisoning enemies. Dependent on people running into him, and he's not that good right now, especially higher up.
Teemo is a Marksman and he poisons with auto attacks. His shrooms are kind of poison like, but they nerfed them pretty good, and again his poison isn't reliable.
We want a mage that uses spells that are reliable to hit and that do damage over time. Not a trap hamster. Not a poison trail chemist. An actual poison mage.