Help about magic Pen

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CCZane

Junior Member

12-06-2009

Im trying to decide which type of runes to buy with Nuking casters like Annie and such but i don't really know alot about magic pen. Say i have 40 magic pen and someone only has 30 MR, does my spell act like they have -10 MR so I am actually amplifying the damage by a Percentage?


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SwampZero

Senior Member

12-07-2009

There's 3 types of magic peneteration.

% Penetration (Mastery, Void Staff)
+ Penetration (Exhaust, Sorc Boots, Guise)
- Penetration (Lich Staff, various other stuff)

First you apply the first. Then you bypass as much as you have second. At this point, you CANNOT GO BELOW ZERO. Then you apply the third. This one can get em below zero.


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CCZane

Junior Member

12-07-2009

Thank you very much for the info.


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mermin

Senior Member

12-07-2009

can we please get a list of all the -Penetration effects


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SwampZero

Senior Member

12-07-2009

As far as i know, lich staff is the only ITEM that is like that. The rest are skills, like FOR EXAMPLE (unconfirmed;;; amumu and fiddle's reductions.