Hey my name is Sunfire230 and I'm going to show you my build which creates karthus a great suicide bomber i pentakill character:(I pentad with this build)

My Runes are Simple:
- x9(Simple magic pen)
-Greater Seal of replenishmentx9(Gives great mana regen at early stages)
- x9(Simple ap/lvl)
- x3(Another bunch of ap/lvl)

Masteries are 22/0/8 with all magic offense and mana regen in uti,and i think i dont need to explain why no point in defense.

Start with a and 2x .-This give a great mana regen early with your other bonuses letting u harass like hell.
Then Farm till you have and
Afterwards get a and a -Ull need the spell vamp and u'll get many stacks even if u died.
From now no more lane phase,you shall get ,then , With U'll have a permanent Fiddlesticks ultimate.
Grab and lastly the only defense: ,It's great for surviving team fights and heal yourself with and Spellvamp.


You can change zhonya's hourgalss for or if the enemy is stacking magic resi.

Max first it's great damage,Second ,LAst: ,And of course Take on every time u can.

- :most important for karthus play,this gives u a chance to go in the fight without hesitation,you will own them after being dead!
- :Great damage great harass low cd no mana cost(nearly) your best friend.
- : Great for ganks with slow and lategame nice armor/mr lowering,use only when needed!
- :Main damage in teamfights,as i asid permanene ,And if needed in the middle of fights.(MIn 5 stacks on )
- :Great ultimate in full game big damage global range.In early game Emeies will be feared or dead, in mid/late game biggest damage in teamfight. Caution! Only use while dead or not near enemy so they wont break channel and take on 150 sec cd for nothing.

- :with karthus flash is not for retreating,anytime u should flash in the middle of teamfights they'll focus you,but u will get your revenge i promise!
- :Grants u a kill and useful vs. Dr. Mundo and Fiddlesticks

No need to use other summoners.
- : you have infinite mana with archangel.
- :I say flash.
-Others i havent mention u dont even have to think about them.

Pros:
-Great damage
-If focused no problem
-1 of the best AP carrys
-He owns even after life
-Global execution
Cons:
-Squishy as hell
-Not a 1v1 vs carry hero
-If u die before fight u can only ult

Karthus' best friends are AoE cc tanky guys whos can hold them in .
THese guys:
- Amumu
- Galio
- Nunu & Willump
- Fiddlesticks with
- Leona
- Kennen

Biggest enemies are
-anti mage character like LeBlanc, Kassadin, Malzahar, Cho'Gath-Silence moar/cc moar!
-and cc immmune carryS: Olaf, Master Yi-you cant catch these guys[
- Soraka:fuuuuu global heal with better scaling than yours.

There are many counters for your ultimate,so if anybody says noob noskill ult and anything u can show this chapter to him/her.

Items:
- :It's active.
- :passive spell shield.
- :passive magic shield.

And also many skills can counter it:
, , , , , , , ,

Farm the entire game when u can,always get the blue buff.
And if on low hp get near a massive creepwave and then +

Early game:
-Harass like hell
-Watch lanes for ur
-lat**** with

Mid/late game:
-Be in the middle of teamtights
-doN't run alone
-use combo:WEQQQQQQQQR xD

With you can solo most thing up to dragon and with you can seal baron easyly if u flash in.

On ranked u shoulda play the same way and at picking hope for being 1st or 2nd pick.
If not,not many chance u go karth mid:S
Banns good for you:-Top priority: Kassadin, Malzahar

In dominion Karthus is one of the most powerful defenders.
He can prevent capturing your basas with sacrificing himself and damage the attackers under .
And as number 2,in dominion there are many 1v1/2v2 fights. Karthus shines at these fights,he can easily outdamage many characters and push towards next base.

But,we'll need to modify our build:
We have to change our for an early to become a bit more cc/defending guy.

Karthus is a great mage,he deals heavy damage,and if u even focus him u die afterwards.
Always pick karthus before enemy does.Never be feared off in fights.
I hope this guide helped you,it was made because Karthus is my fav charater and i love it.
With this build you will have like 950 AP with 20 stack mejai.

GL&HF,
Sunfire230-EU West


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