DoTs and Magic Penetration?

[quote=Boraxed]I was looking at the thread dedicated to how AP and Mag Pen work but I couldn't find any mention on how it affects DoT spells. Does it apply for the whole ammound of the DoT or does it affect each individual tick, or if it affects it at all.[/quote]

[quote=Mowen]For magic pen: http://www.mobafire.com/league-of-legends/forum/theorycrafting/lvxs-theory-crafting-compendium-game-mechanics-and-effect-maximization-197 For DoTs the AP it will depend on the wording of the spell. For example... [[Decrepify]] - Since it is worded "the target takes 25 / 40 / 55 / 70 / 85 (+30% of ability power) damage per second" AP is applied on every tick. [[noxious trap]] - Since it is worded "Poisoned enemies take 350 / 500 / 650 (+80% of ability power) magic damage" the AP would apply to the overall damage and not every tick of poison. If you have any more questions check http://www.mobafire.com/league-of-legends/forum/help/new-player-faq-2256 hopefully it will have the answers.[/quote]

[quote=Boraxed]Ok. That helps. Working on a Cassiopiea build and figuring if Magic Penetration is worth it[/quote]

[quote=Boraxed]Ok. That helps. Working on a Cassiopiea build and figuring if Magic Penetration is worth it[/quote]

[quote=Jebus McAzn]Magic Penetration applies on all magic damage you do, regardless of whether it's DoT or instant. It's not even relevant in this scenario, actually. But Mowen did a great job of answering the question - you have to look at the wording. Definitely build magic pen on Cass.[/quote]

[quote=DEWO]Still one thing was not covered. For example [[Abyssal Scepter]] will not afect the DoT if you move out of range. So if you plan on buying this remember that you will have to stay in range for it to deal bonus damage due to Mpen aura it gives. same goes for [[Bushwhack]] for example if it runs out the damage will get lower.[/quote]

[quote=Miraisen]Another question, kind of related. Will magic penetration help on hit effects that apply magic damage? I'm thinking [[Wit's End]] [[Sword of the Divine]] and others. Or is that independant?[/quote]

[quote=DEWO]If it is considered a magic damage. It will. And as far as i know both those items do magic damage, so yes. it will benefit you.[/quote]

[quote=Trojan995]If I'm not mistaken, Wit's End actually deals true damage. I saw that on an Elementz post, but I can't confirm it.[/quote]

[quote=Jebus McAzn]http://leagueoflegends.wikia.com/wiki/Wit%27s_End "Your attacks deal 42 bonus magic damage." Unless this is a bug, in which case I'm mistaken.[/quote]