History
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.
''For Noxus, death is a promotion.'' -- Pantheon
Introduction
hello i'm a "noob"
i'm not pro I played sion alot and know how to play this champ. I been tower, aswell as pool-diving people with this build and I hope you get as much fun as I did.
Sins the day I started playing Sion size 16 I been evolving my build more and more. As I tried
as the first champ ever I still love Sion the most. When I started playing all my friends was lvl 30. So of course I played with them and played against lvl 25-30 at my first fights. Sins then I been playing alot and now also know alot. This guide will take you though Sion as I see him. A Dead Walking Massacer Of Death And Blood.
Skill Sequence

Cryptic Gaze - Sion's stare terrifies a single enemy, dealing damage and stunning them.
Blasts a single enemy, dealing 70/125/180/240/300 (+1) magic damage and stunning for 1.5 seconds.
Cost 100/100/100/100/100 Mana
Range 550
I use this spell mostly course of the stun. You will need it to kill enemies. The idea is that you stun use ulty and kill. It can't be that hard.

Death's Caress - Sion surrounds himself with a damage-absorbing shield. If the shield is not destroyed in 10 seconds then it will explode, dealing damage to surrounding enemies. Cast again after 4 seconds to manually detonate.
Sion surrounds himself with a shield which absorbs 100/150/200/250/300 (+1) damage. If the shield is not destroyed in 10 seconds, it will explode, dealing 100/150/200/250/300 (+1) magic damage to surrounding enemies.
Cast again after 4 seconds to manually detonate.
Cost 70/80/90/100/110 Mana
Range 1
The sheild I dont use before the end game. Course of the fokus on enrage that I got. the sheild is only for end game course of the explotion at last. Will do more dam. then in the start. If you say "yah yah I use it for farming" then dont play this build, go last hit insteed of using it.

Enrage - While active Sion deals extra physical damage at the cost of health. Additonally, he permanently increases his maximum health whenever he kills a unit.
Toggle: Increase Sion's damage by 25/35/45/55/65, and he gains 1/1.5/2/2.5/3 maximum health per kill.
Cost Costs 6/8/10/12/14 Health
Range 1
Fokus your enrage evry time that you see the enrage take it, and after that gryptic gaze. Keep on farming with enrage to get more health, you will need it. Try to last hit minions and let them push abit so your not just standing right outside tower range.

Cannibalism - Sion consumes some of his enemies life force on each attack, leeching health to himself and nearby allies. The smell of flesh also renews Sion's fervor, increasing his attack speed.
Grants Sion 50/75/100% lifesteal and 50% attack speed for 20 seconds. Additionally Sion's attacks heal surrounding allies for 25/37.5/50% of damage dealt.
Cost 100/100/100 Mana
Range 1
At the start you dont need to save it too much, but when you get the 75% life steal save it for team fights. And at 100% dont use it unless there is three against you or one other.
Pros / Cons
Pros:
1. Sion get health evry time he kill something.
2. He can heal himself and allies in end game on 3 minions.
3. He is able to kill a hole 5 man team with help from one supporter
4. He's awsome!
Cons:
1. He can waste his ulty if he gets snared and stunned to much.
2. you will need a good minion farm.
Masteries
"It will rain blood!"
As I see it the masteries can be evolved I have never pendet on my masteries as I played lvl 1 against lvl 30. I still had a perfeckt chance of killing them. If you got any better supmisions please tell me in a comment and i'll look it up.
Runes
My runes are all spent out so they will buff some of the strongest sides of Sion. There is the magic pen. and attack speed. But also this could get better. I just feel good with this set up, and I perfore this. Also here you can comment on have you make it, course this can also get improved. As I see this runes have helpet me out of alot of trubel and i'm thankfull for that.