Armor - blocks incoming PHYSICAL damage. More armor = more blocked damage. Math time: blocked damage is calculated like this:


That means (i.e) if you have 100 armor, you will block 50% of incoming physical damage (100/(100+100)=50%). Armor has best scaling at lower values and fades off with higher values. Simply said, getting 50 armor if you have 30 armor (80/180=44% block) is more worth than getting 50 armor if you already have 200 armor (250/350=71% block; without that bonus 50 armor you will block 23% resp. 66%, so the gain is 21%. resp. 5%). The point is the price for increasing your blocked damage from 20% to 25% is lower than from 50% to 55%.

MR = Magic Resists - blocks incoming MAGIC damage. The math is totally same as with armor.

ArPen = Armor Penetration - is the value of enemy armor you will ignore if you attack enemy champion/minion/neutral camp. ArPen can be solid value (i.e. 20) or % value (i.e. 40%). Some example: if the enemy has 100 armor (blocking 50% of incoming physical damage) and you have 50 ArPen, the damage will be counted as if he has only 50 Armor (=blocking 33% of incoming damage). This panetration is counted first from solid values and then from % values. ArPen CAN NOT go under 0. If you have more ArPen than your enemy has armor, you will deal true damage to him.

MPen = Magic Penetration - is the value of enemy MR you will ignore. Works exactly the same as Armor Penetration.

MS = Movement Speed - shows how fast your champion moves over the battlefield. If you are faster, you can gang more often, you can easily chase enemies. The simpliest way how to improve you MS is to buy boots. NEVER EVER play without boots. Boots give you solid value (50 MS with T1 boots, 70 MS with T2 boots...). There are some items that give you % boost to your MS ( Phantom Dancer, Force of Nature, Lich Bane, Trinity Force). Last option how to improve your MS is summoner spell Ghost.

AS = Attack Speed - shows how often you can use your autoattack. The AS of 1,00 = 1 autoattack per second. So the value < 1,00 means you need more than 1 second to land every additional autoattack (mostly with AP carries), values > 1,00 means you can land more autoattacks per second. AS is capped at 2,50, that means you can land "only" 2,5 autoattacks per second.

AA = autoattack - right click to win. If you click with your right mouse button at enemy you will perform and autoattack.

AD = Attack damage - is composed from two values. First is the basic AD - solid value you will get every time you lvl up. Every champion has lvl bonus to his/her basic AD. Second is the bonus AD - its granted from items, masteries, items. AD shows the strenght of your autoattacks. And with some champions it improve damage from some spells.

AP = Ability Power - is the strenght of your spells. The difference from AD is you will start with 0 AP. AP can only be get by items, masteries, runes. Most spells has some AP ratio. That means you will get some % value (i.e. 50%) of your AP to damage/heal to that spell.

HP = Health Point or Hit Point - simply said, the ammount of damage you can take before you die. 0 HP = death. More HP = longer life.

True Damage - is the damage that cannot be countered by Armor or MR. Only way how to counter True Damage is higher HP pool.

CDR = CoolDown Reduction - every spell has some cooldown. Ultimates (R) mostly higher values, basic spells (Q,W,E) mostly few seconds. If your spell is at cooldown (marked as CD) you cant use it. CDR decreases this value. It is caped at 40%, it is pointes to get i.e. 60% CDR, because it will work only until 40%. The difference between 0 % CDR and 40 % CDR can be huge. Imagine Ultimate with 60 seconds CD, with 0 % CDR you will still have 60 seconds CD, but with 40 % CDR, you will have only 36 seconds CD and that can be the difference between won and lost game.

DoT = Damage over Time - spells that deal some amount of damage in matter of few seconds. The typical example is Ignite - it deals true damage over time. Mostly DoTs are poisons, but even some other spells ( Malefic Visions).

CC = Crowd Control. CC abilities are split into two categories. First is soft CC - typical example is slow. It "only" reduces you MS, but doesnt reduce your damage output. Second is hard CC - typical example is stun. If you get stunned (stoned is another example, but I dont want to talk about it right now), you can do NOTHING. Only option how to get out from hard CC is to use Cleanse or Quicksilver Sash (and some spells).

Tenacity - reduces the time of CCs at you. Tenacity is NON-STACKING ability. There are few items in game the grants Tenacity. You can have only one thing with Tenacity ability (ofc, you can have more of them, but the effect is same as with one item).

ITS ME, GUYS! LOL