Orianna is very usefull class. It can support, or deal enormous amount of dmg. It can chase, slow enemy down

PROS:
- Good farmer
- Good harasser
- Very good support
- Very good damage output

CONS:
- Can be pushed back
- Drains a lot of mana
- No slowing method besides little dissonance slow (solved with red buff)

Clarity is a must. Early game she is very mana hungry. If you want to stay in lane as long as possable, you need clarity.

Flash is usefull for many reasons. you can flash in, flash out, you can to lots of stuff with it.

Clockwork Windup(passive)
Orianna's autoattacks deal additional magic damage every hit, subsequent attacks on the same target within a few seconds will add more damage per hit. This bonus stacks up to three times
Command: Attack(q)
Orianna commands her ball to fly towards target location, dealing damage to targets hit but doing reduced damage for each additional target hit. Her ball remains behind at that location afterwards.
Command: Dissonance(w)
Orianna commands her ball to emit a magnetic pulse, dealing damage to units around it. Afterwards, the ball leaves a field behind for a few seconds that speeds up allies and slows enemies.
Command: Protect(e)
Passive: The allied champion the ball is attached to gains bonus Armor and Magic Resistance.
Active: Orianna commands her ball to fly to and attach onto an allied champion, dealing damage to enemies it passes through and shielding the allied champion when it arrives.
Command: Shockwave(r)
Orianna commands her ball to emit a shockwave after a short delay, flinging affected enemies in the vicinity into the air a set distance towards, and possibly over, her ball.

Only one way to do it right ;) More AP you have, more dominating, you are

Greater Quintessence of Potency
Greater Glyph of Potency
Greater Seal of Potency
Greater Mark of Potency

you can ****ch some AP runes for magic pen, witch is very usefull in late game, but i preffer dominating in early, mid game.

mejai's soulstealer: Important item. When you get kill, you get more ap ;)
rabadon's deathcap: Get this item ASAP. It will give you lots of AP, you will dominate even more.
lich bane: this item is... lets say best item for orianna. Buy it, and you'll see the diference!
rylai's crystal scepter: you need some hp, you need some ap.
rod of ages: lil more hp, mana, ap.
sorcerer's shoes: magic pen.

well, there are 2 ways, how to build it.

1st: 0/19/11
2nd: 9/0/21

i think these 2 ways are best.

Some tips:

lets say you are running: If you want to escape, and you dont have flash anymore, use 'w', it will give you some movment speed, and it will slow down the chasers.

You can do the same, if you are chasing someone with low hp. You can safe many team mates with the 'e'. It will give them shield. In team fights, be aware; stay behing, try to support with shield and slow/speed, If enemy is spliting, use ulty(r) than (w). it will bring em together, and slow em donw. Now they are easy target.

Lets say you are lv 6, with low hp. enemy annie is pushing your lane, than she decide to dive. what do you do? use ulty and shield, than slow!-thats a 100% kill.

There are more tips, secrets, ways to play orianna, but you will have to fing it for urself.

Playing As: Orianna

* Command: Protect can be used on yourself to return the ball back to you quickly. Combine this with Command: Attack for a quick harassment.
* Command: Dissonance is a very powerful escape tool if Orianna has the ball. The combination of speed and leaving a slowing obstacle can be quite powerful.
* Command: Shockwave can be used to drag enemies towards you or away from you if you position the ball properly.


Playing Against: Orianna

* Orianna can only affect the area the ball is around. Use this to your advantage.
* Watch out for Orianna's ball returning to her due to leashing. This may cause some unexpected situations.

There once was a Piltovian man named Corin Reveck who had a daughter named Orianna, whom he loved more than anything else in the world. Though Orianna had incredible talent for dancing, she was deeply fascinated by the champions of the League of Legends. This fascination compelled her to begin training to become such a champion. It is unfortunate that her sheltered, wide-eyed naivete led her to take unnecessary and dangerous chances which ultimately led to her tragic demise. Orianna's death shattered Corin, driving him into deep depression and an obsession with techmaturgy. He could not stand the void his daughter's death left in his life, so he decided to build a replacement - one that would complete Orianna's dream of joining the League. What was created is the clockwork killing machine that Corin named after his daughter. Knowing that she was destined to be a champion and seeing the way the times were changing, he created The Ball as her pet and protector. This nearly symbiotic creation uses a different type of techmaturgy, relying more heavily on electricity than clockwork.

Orianna and The Ball now fight as Champions in the League of Legends, using her sometimes misguided morality as a compass. She tries in earnest to fit in with those around her. However, no matter how hard she tries, Orianna can never be human and there is always something unnerving and alien about her. Though she attempts social interaction with other champions in the League of Legends, there are few who can get past her exotic nature. To many, it's as if there's nothing inside, that Orianna is just a soulless clockwork shell - a dangerous and deadly one at that. However, all along she remains the perfect daughter in her father's eyes.

''Dance with me, my pet. Dance with me into oblivion.''