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karthus is awsome
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Choose Champion Build:
you will learn how to build karthus.
1.how to set they mastery tree.
2.which skills to learn after each other.
3.which rune´s you need to buy.
4.which items in game you need to buy.
5.which spells are needed which karthus.
6.how to use karthus and other information.
wall of pain : you need to use it early game to escape with karthus in lane farming ´why´ if you use it for that you can rush in on the minions and make easy kills on the minions.
if you use it with karthus in control you should use it when an enemy champion is standing on a difficult place so he could barely escape if you place they wall of pain behind him.
defile : is very important for karthus in lane farming ´why´ you have large amount of mana early game so you can kill they minions easy and this uses up lots of mana but deals lots of damage.
if you use karthus in control you should wait with defile because you don´t have much mana early game and you could build it up.
if you want to use him good but online it is going wrong read my page of karthus or look on youtube for a video how they play it but you still need to use my build up because it works perfectly.
you should play in mid lane safe and in control.
don´t rush too fast in the enemy champion in mid lane.
you have to wait until the enemy minions have low health and then finish them of so you will be stronger later on.
karthus in control
you have to push the mid lane with karthus.
minions same way.
cons : weak early game AP - pretty low health early game - you have to use him right - need level 6 before getting strong.