Hello This is my first guide, be gentle. I like the new champ because her play style is so different than any of the other champs. Hope you enjoy her voice overs as much as I do and look forward to seeing you on the Fields of Justice.

Work in progress Updated Soon

Marks : Chose magic pen because for Orianna it is the best fit here
Seal : She needs mana bad and since i'm not really buying any mana items we have this regen and clarity so it should be enough
Glyph & Quint : You should use AP because early on Orianna can really dominate. As soon as she hit's two she has a devastating combo with her+. So the more AP the Better

I chose Ryla's first because she needs some sustainability in lane and the extra health from the Rylas is awesome, not only that but the slow on it helps with those really quick champs that get out of yourafter you hit them with. You need boots Second but if you have to go back get the boots of speed before you get the blasting wand if you are low on gold. After that Rabadons for obvious reasons, and then Lich Bane because with her passive this is actually a really nice item.

Orianna works very well in a team. You should let your tank initiate and then after the a sec or when you see there carry start their combo on someone you should use. IT will throw all the enemy champs in the circle at the ball ad do substantial damage. Not only this but your team should easily be able to kill them all now with maybe just one casualty.