I´m very glad to introduce you all my Xerath guide. As you might see.
This guide is for everyone, who wants to play an agressive, straight fighting Xerath.

So, have fun ;-)

My runes are based on Ability Power and magic penetration.
For Quinntessence I choose Force, because we want to **** everyone in late Game.

I play 9:0:21 with the difference that my 21 doesnt look like in other guides.
I made the experience, that its most important for early and mid game to have enough mana.
In this phases, Xerath hasnt enough mana to stand long enough.

As you can see, i doesnt start with Doran´s Ring. It doesnt give enough mana /mana reg as i whould take it in the early game battles.
My ap is at the beginning high enough so I buy directlyto finish up as soon as possible my.
After this buy the Shoes, hang out, kill a bit. Then try to finish. At this moment your mana isnt any more a really big problem. But still dont waste your shots.
Then take. At this moment everything should look fine.
Now for the really big damage finish up.
After this complete your.

Now your core build is finished. The nother items I listed are just suggestions. If you want to take different ones, take what you want. Now you are strong enough to handle what ever you want ;)

I prefer flash and ignite. Flash because you need at for chasing and escaping.

Ignite for finish up your oponents in early / mid game.
Thats all ;)

Pros:
Ranged killer.
Nice for ambushing oponents.
exact chaser.
squishy but very able to survive.

Cons:
An flying stonehead.
No russian.