Teemo's toxic shot should apply spell effects
"But it's not a spell, just a passive!" 
"But it's an on-hit effect!" 
There's no reason
's E shouldn't apply

"But it's not a spell, just a passive!" 
"But it's an on-hit effect!" 
There's no reason
's E shouldn't apply

If they made it a toggle to consume mana, but buffed it to do more damage.. it would make sense as an ability..
but as a passive.. that would be OP.
Yes, give teemo a 40% slow on every auto attack...seems good.
I mean...
It's totally not like we Teemo's often to exactly that 
The current effects that apply spell effects with auto attacks or consistent damage over times are already broken, such as Kayle and Brand, but if Teemo can apply a 40% slow for FIVE SECONDS on every attack, that would make him insane.
The current effects that apply spell effects with auto attacks or consistent damage over times are already broken, such as Kayle and Brand, but if Teemo can apply a 40% slow for FIVE SECONDS on every attack, that would make him insane.
It would be 20% because it's a dot... But also...

Most spell effects would be actually less broken with that than most people fear, Teemo's often get permaslow anyway, and FQC or Echo aren't that powerful.
But the problem would be burn from
. Constantly burning your lane enemy is a big no-no.