Don't Downvote without reading everything. I will finish guide late. To reach 5000 characters ignore this plz... [h5]LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAALLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLllLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA[/h5]

Prior to the creation of the League of Legends, the city-states of Demacia and Noxus were locked in a brutal series of on-again-off-again wars that spanned the course of centuries. Both powers sought an advantage over the other, but Noxus was the city-state willing to forego conventional morality to achieve its goals. Only brute strength and the will to use it mattered to Noxus, and this is best exemplified in the murderous warrior, Sion. Used by the Noxians as a human battering ram, Sion would be sent thundering ahead of Noxian troops. He would mercilessly slaughter foes with his large double-bladed axe, "Chopper". His complete disregard for caution ultimately cost him his life, as he was captured and summarily executed by Demacian forces.
The Demacians thought that the beheading of Sion would be the end of his bloodthirsty ways. Death, however, was merely the beginning of Sion's rise to power. The famed Noxian assassin, Katarina, recovered Sion's remains and Noxian necromancers reanimated the behemoth to serve Noxus once again. Sion's reanimation actually bestowed new powers on him and increased the potency of his existing abilities, making him even more of a terror to behold on the battlefield. The Noxian High Command had a powerful new weapon in their hands - one they have brought to bear as a champion in the League of Legends. Even though Sion's increased powers would make him a powerful tool for the High Command's use outside the Fields of Justice, Noxus no longer risks losing one of their greatest champions in the League to chance or circumstance; Sion's days as a front-line fighter for Noxus' military conquests are at an end.

Pros

Great power of stun(1,5 seconds with

cryptic gaze)
Can play both Tank/ DPS/ AP
Can have Infinite HP because of his third spell Enrage
Can receive reduced damage, with passive, so you can go a bit more suicidal
Can scape to gangs while he is building DPS(Phantom Dancer)
Can use shield(when doing AP is very useful) for defendingor deal extra damage(shield explosion)

Cons

Has No Long Range(only stun)
Is Susceptible To CC
Not much Mana...

Doran's Ring? AP in the begin when we are going to do Damage?. Ok... At the FB, if you want to get him you just hide in the bushes and cast a spell and persecute your enemy. Sion has a 1,5seconds stun spell at level 1. With 1Ap you do up 1 more damage!! And you have mana regen increased, one of the biggest problems in Sion.
Berseker Greaves? Essential...
Phantom Dancers? Obvially... more attack speed, more critical strike and more movement speed(550 movement speed, it's very fast)
Bloodthirsters? Now they removed the UNIQUE Passive of this item, and it's only Passive. That means 2 Bloodthirsters=200 DMG and 50% Lifesteal(with ulti is 100% Lifesteal, so you recover 300 health for each hit)
Infinity Edge? If you have so many critical strike without it(80%), you can joint this(more 20% so 100% critical chance) and instead of deal 200% damage(crit.strike) that deals 250% just do some math

366 DAMAGE Crit 200%-732
Crit 250% about 900 just go with the bloodthirsters and ulti, is a death machine.


NOTE: In the mid of the game just delete the Doran's Ring to buy Infinity Edge(Last Item)
ALWAYS BUY THE 2 Phantom Dancers after the boots and don't get them after bloodthirsters. The most important is to you move fast, crit strike and can have Lifesteal+Attack Speed with the ulti!!!!!

Just Stun, use shield, use ulti(if you are low HP, to get more health) and deal continuous Physical Damage. If he his scaping just explode the shield on his/her face

My record was(about)

6530 HP without HP items. This is because of Sion Enrage. You just have to farm much minions and get health from them(3 HP for kill I think)

I have to go, just comment and I complete this guide I know it is much Incomplete