Armor Penetration
How does Armor Penetration/Reduction Work?
Armor Penetration and Armor Reduction are the statistics of a Champion which allows them to counter some or all of a target's armor. All champions have 0 base armor penetration but can increase it with items, runes, or abilities for a few champions.
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Armor penetration and armor reduction are applied in the following order:
1. Percentage Armor Reduction (  Jarvan IV's  Dragon Strike)2. Flat Armor Reduction (  Nasus's  Spirit Fire)3. Flat Armor Penetration (  Greater Quintessence of Armor Penetration)4. Percentage Armor Penetration (  Last Whisper)
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Items with Armor Penetration/Reduction
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Total Price: 2300
Recipe Price: 1025 // 40 Attack Damage. UNIQUE Passive: +35% Armor Penetration |
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Total Price: 1337
Recipe Price: 537 // 25 Attack Damage. UNIQUE Passive: Reduces ability cooldowns by 10% and +10 Armor Penetration. |
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Total Price: 2700
Recipe Price: 563 // 30 Attack Damage, 15 Critical Strike Chance. UNIQUE Passive: 10% Cooldown Reduction and +20 Armor Penetration. UNIQUE Active: Gives 20% movement speed and +40% attack speed for 4 seconds. Attacking enemies with melee attacks increases the duration by 2 seconds to a maximum of 8 seconds. (60 second cooldown) |
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Total Price: 3000
Recipe Price: 1188 // 200 health, 50 Attack Damage, 10% Cooldown Reduction UNIQUE Passive: 10 armor penetration UNIQUE Passive: Dealing physical damage to an enemy champion reduces their armor by 5% for 4 seconds. This effect stacks up to 5 times. |
Last Whisper vs The Black Cleaver
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Last Whisper 2300 Gold = 40 Attack Damage + 35% Armor Penetration The Black Cleaver 3000 Gold = 200 health + 50 Attack Damage + 10 Armor Penetration + 5% * 5 Armor Reduction Advised Purchasing: 0-40 armour = Youmuu's Ghostblade40-100 armour = The Black Cleaver100 armour+ = Last Whisper
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*Note, this does not include masteries, runes, or champion abilities.
Some Abilities with Armor Penetration/Reduction
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 Corki's Gatling Gun fires multiple shots every half second dealing a fifth of his total damage, and shredding the armor of enemies who are under continuous fire.
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Nasus unleashes a delayed spirit flame at a location, dealing damage and reducing the armor of enemies who stand on it by 20/25/30/35/40.
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 Shyvana unleashes a fireball that deals magic damage and melts the target's Armor by 15% for 4 seconds.Dragon Form: Flame Breath engulfs all units in a cone in front of Shyvana.
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 Wukong's next attack will deal additional physical damage and will reduce the enemy's armor by 30% for 3 seconds.
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Masteries with Armor Penetration/Reduction
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+8% Armor Penetration.
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+2 / 3,5 / 5 Armor Penetration.
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Improves the following Summoner Spells:
 Exhaust: Reduces target's Magic Resist and Armor by 10.
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Runes with Armor Penetration/Reduction
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+1.28 armor penetration
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+0.9 armor penetration, +0.62 magic penetration
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+2.56 armor penetration
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+1.79 armor penetration, +1.4 magic penetration
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hey, couple of questions... Does Tarics shatter stack with nasus circle thingy and is there a cap for armour pen like with CD reduction? |
 RIGGOLOL Posts: 1 Joined: 2012-08-18 |
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Belatedly: yes, all the reductions stack, but the percent ones are multiplicative. The only cap, as far as I'm aware, is 0 Armor, but I could be wrong there too. |
 Yuki Artwaltz Posts: 4 Joined: 2013-04-13 IGN: Yuki Artwaltz on NA |
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God this was outdated, updated the stats |
 Meiyjhe <Scout> Distinguished (234) 
Posts: 2501 Joined: 2012-10-27 IGN: Meiyjhe the Epic on EUW View My Blog |
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Oh banana man you scouty boy. +1 Rep me if you think I help you or others or don't
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 DarkAkumaLord Notable (42) Posts: 601 Joined: 2012-09-02 IGN: DarkAkumaLord on NA View My Blog |
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