Fizz's W while inactive still procs Luden's effects on the passive's DOT. However, Teemo's E, which is also a DOT, does not. Is this intended? Could we get Teemo's E to proc it as well? They're both magic on-hit effects! I feel like this should be addressed now, while the Legendary skin is hot out of the oven and Luden's is still fresh.
Also worth noting that Brand's DOT passive procs Luden's as well.
Might be worth putting this in the Report a Bug section to make sure a red sees this.
Maybe Fizz's W is somehow coded to act as a spell and not an on-hit effect? Brand's W is something that procs from his spells, so it's not an on-hit effect, while Teemo's E is proced by basic attacks and is an on-hit effect. Fizz's W might be coded to function as a spellcast for some reason.
Brand and Fizz's passives are linked to active skills, and thus get the benefit of ability-based items (same with jax's ult passive). Teemo's passive is purely passive and thus can't even proc Liandries.
lol jk, the real reason is because this game has 0 consistency and every ability works differently.
Gangplanks Q counts as a basic attack, so it will proc on hit effects but not ability effects, even though it can be spellshielded. Warwicks ult also does on hit effects but will not proc sheen-based items.
Jax's W will proc spellvamp, Nasus' Q will proc Lifesteal. Poppy's Q turns the entire attack (All it's AD too) into a magic attack, yet still procs on-hit effects (possibly in addition to ability effects, just like Jax's W)
If blitz is blinded, his knockup will miss, if Xin is blinded, his knockup (and pretty sure all 3 Q attacks) will hit.
Some on-hit abilities work on towers, some do not.
Some passive stack abilities (such as caitlyn counting up headshots) will count up on towers, some will not.
The list goes on.
It might be because of the range difference, though since Teemo is short range with low mobility, where as Fizz is melee range with high mobility I see no real difference. It would really only effect the laning phase, and if you get a Ludens during the laning phase your opponent has bigger things to worry about.
Other things that can proc 
are the Gromp buff, and I think 
defensive curl thornmail thing.
According to the wiki, Fizz's W shouldn't apply any spell effects from the active OR the passive. Maybe they broke that when they shifted the % damage back to the passive.
You want to make his poke even better?
plz nu rito.
Ludens is just weird. It works on certain on-hit effects, like Jax W, but not on others, like MF W. Certain dots don't proc it as well.
please. teemo is powerful enough. we dont need it on that too. (plus, it wont proc from autoattacks, cause even if it is an ability, it is a passive. there is no activating it. i had it explained to me a while ago by someone, i forget exactly how it works, but i dont think rito is gonna change anything.)
On the off chance that Riot reads this thread and does something, I have an additional observation...
Teemo's E does not proc spell-vamp, even though Cho's E does. As an auto-attacker, it'd be nice to get a little sustain.
Why the hell doesn't gp q proc ludens? Just because a spell procs on hits doesn't mean it shouldn't prob on spell hits.
Teemo's poison is an **on-hit ** effect, which means it functions like an auto attack modifiyer, Think Garen's Q. Ezreals Q behaves the same way, despite dealing magic dmg.
Ludens only procs on SPELL EFFECTS. An attack can only proc an **on-hit ** or spell effects, never both. Fizz is the only noted eception to this rule.
From LoL wiki:
Urchin Strike [Q]:
ACTIVE: Fizz dashes a fixed distance in the direction of the target enemy unit, dealing 100% AD physical damage plus bonus magic damage. The physical damage applies **on-hit **effects and the magic damage applies spell effects.
His e is a passive
It's because Teemo's E is a passive skill while on the otherhand Fizz's W is an active skill. So yes it is very much intended.
How are 50+ people this clueless
/thread
Last time I fought Teemo casting his mushroom without hitting anything triggered Luden's... so yea.
Fizz's W while inactive still procs Luden's effects on the passive's DOT. However, Teemo's E, which is also a DOT, does not. Is this intended? Could we get Teemo's E to proc it as well? They're both magic on-hit effects! I feel like this should be addressed now, while the Legendary skin is hot out of the oven and Luden's is still fresh.
Fizz's W DoT is an on-hit effect, not a spell effect, and it should not be activating Luden's.
I'm pretty sure that it's happening because, for a while, his W's DoT was on the active portion.
Either that, or it's activating because it can also be proc'd by his Q. Which would also be a bug.
Also worth noting that Brand's DOT passive procs Luden's as well.
Brand's DoT passive is a spell effect. While attack on-hit effects cannot proc on-hit effects, spell effects can proc spell effects. This is also why Rylai's and Liandry's are considered core to Brand's build.
Ezreal Q doesn't proc luden's either.
I was wondering the exact same thing awhile ago, I never saw this thread though! I am curious.
Well, that was unexpected.
Urchin Strike and Seastone Trident (Active) proc spells effects. Singlet target effect. i.e.: 35% Rylai's Slow. Seastone Trident (Passive) and Luden's Echo proc spell effects. Reduced effect i.e.: 15% Rylai's Slow.
Yes, Luden's Echo could technically proc itself.
Rylai's vs Gromp Base Movement: 330MS Seastone Trident (Passive): 281 MS (15% Slow) Season Trident (Active): 217 (35% Slow) Q+W: 217 (35% Slow) Q+W Active: 217 (35% Slow)
The DoT also empties Spellthief's edge almost instantly.
Cho Gath's E works the same as Fizz's W even though they both do the same thing as Teemo E. The only difference between them and Teemo is that clicking that key actually does something. Cho and Fizz are coded as spell effects, Teemo is coded as on-hit. Fizz's Q and Jax+Poppy are all both on-hit and spells.
Riot does what they want.
It might have to do with the interaction if teemo bought both shiv and luden's. Together while being ranged would apply quite a large amount of damage. AFter all on teemo that's actually a pretty viable route since he does mixed damage. On the other hand fizz doesn't really benefit from a shiv in anyway since he would have to be building AD for it to really affect anyone.
I was under the impression that Teemo's poison DoT procs Luden's, but the application of it doesn't.
