I don't actually have a name for it or any artwork I just know what the passive ult and maybe q,w, or e would be.
So the passive would be a stacking poison that could be applied on every other basic attack. it would stack up to four times and at three stacks it would give his other abilities extra effects if used on that target. ( he is designed as a melee champ)
It's ult (at the moment i call it expunge) would be a targeted ability that does flat damage+a % of ALL your poison damage on the target. so what this means is if you have 3 stacks and (possible other poisons) on a target and you use the ult it will do substantially more damage.
one of it's other abilities could be a bite attack that does a small amount of flat damage and applies a light poison (as in it doesn't do a lot of damage) that also slows. If used on a target that has four stacks of the passive it could slow or something.
Written by and
if i have anymore ideas as well as updates on this champ concept I'll link to it
and 
if i have anymore ideas as well as updates on this champ concept I'll link to it