Moth themed poison mage
We have plant ladies, fish ladies, spider ladies, bird ladies and even fox ladies. I believe it's time for a moth lady.
When I was coming up with this idea, I originally wanted a mobile mage that poisoned everyone and realised that is an awful idea. It leaves open the idea of just hit and run and watch your opponent burn. What I decided was a better idea was a bruiser. Someone that can get in or out but not both. Someone that struggles with short trades but excels in whittling enemies down with repeated poisons.
This lead me to very second issue. How exactly do you stop poisons from being just "slap one on and leave" and I came up with an idea. My little poison princess would get cumulative power from poisons. tapping you with a poison would hurt a little, but she's against legends. As such she carries 5, and each poison makes the other more potent. Her abilities and scaling would each be some of the weakest I the game, until she hit you with more.
Her weaknesses of course would include cleanse, and her needing drawn out fights. She either sticks to you long enough to apply multiple poisons or she does little. If you are against her, you need to make a choice, either kill her before she poisons you enough or get out.