Greetings summoners
Let me introduce you my guide for Ahri, the Fox. This guide will show you how i build up my Ahri. Get inspiration, feel free to experiment with the build and let me know if u find some item combination rly good for her to make me test it ;)
Please write me comments and also objective critics, it will surely help me to improve guide/skill.

Pros
good farmer
perfect ganker
ungankable when played properly
she has TAUNT !
her ulti FTW
two skill shots

Cons
quite squishy
not a lot escape mechanics when ulti is on cd
needs to be played properly or she sux
two skill shots

Soul Eater - Ahri gains a charge of Soul Eater whenever one of her spells hits an enemy (max: 3 charges per spell). Upon reaching 9 charges, Ahri's next spell has 35% Spell Vamp - decent passive, really helpful for laning phase and op while combined with Hextech revolver mid/late game.
Orb of Deception - Ahri sends out her orb, dealing 40/65/90/115/140 (+0.33) magic damage, and pulls it back dealing 40/65/90/115/140 (+0.33) True damage. Cost 60/65/70/75/80 Mana. Range 880 - your main dmg spell (except the ulti). Through this spell u lifesteal the most when passive is on, while this spell is lifestealing on the way there and also on the way back! Dont forget that the way back is true dmg...perfect for taking down tanks.
Fox Fire - Ahri releases three fox-fires. After a short delay they lock on to nearby enemies (prioritizes champions), dealing 40/70/100/130/160 (+0.38) magic damage. Additional fox-fires that hit the same target deal 50% damage [max damage: 80/140/200/260/320 (+0.75)]. Cost 60 Mana. Range 800 - max it last, it's well combined dmg while ur escaping u dont have to stop to cast, it autoattacks nearest target, while prefering champions!!!! + amazing range. Dont max it first, it's rly good spell only when u have enough ability power, because its max dmg to one target is going up mainly by your AP.
Charm - Ahri blows a kiss dealing 60/90/120/150/180 (+0.35) magic damage and charming the first enemy it hits, causing them to walk harmlessly towards her for 1/1.25/1.5/1.75/2 second(s).Cost 50/65/80/95/110 Mana. Range 975 - this ability is simply AMAZING, taunt duration 2sec, it does slow the target it hit. When maxed, this ability is quite strong. The thing that most players dont know is that taunted champion does NOT attack you! Charmed champ only go straight to you and when he reaches ur position, he stops and just looks at u ! FTW :P
Spirit Rush - Ahri dashes forward and fires essence bolts at 3 nearby enemies (prioritizes champions), dealing 100/140/180 (+0.3) magic damage. Spirit Rush can be cast up to three times within 10 seconds before going on cooldown. Cost 100 Mana. Range 450 - awesome ulti, perfect damage, escape ability, chasing ability, towerdiving ability. It's just so fkin perfect. The important thing to mention is that the Fox is rushing the way she is facing and it can be used to jump through most of all walls.

The best choices:




Other possible choices:



Other summoner spells are simply bad for Ahri

Runes in this build are pretty standard, except the glyphs where i go for AP per lvl instead of cd reduction...this is clearly personal choice, whether u like to have cd reduced or u want moar ap while Fox's ap ratios are quite low same as most of her CDs.

Just one thing i want to clear out about my masteries choices, here we go!

Butcher 2/2 ...I pick this mastery to make my last hits more easier, this is also preferencial
if u feel like u dont need these two points in Butcher, feel free to pick another mastery instead.
Rest is pretty standard.

First i buy Doran's Ring, which is pretty standard.
Most of all times i go back from lane when i have enough gold for the second Doran's Ring and basic Boots. I rush Rabadon's Deathcap everytime afterwards, while its rly necessary for Ahri to have it. I like to get Sorcerer's Shoes after my deathcap for more mobility. Now its the time to decide if u rock as hell... you should go for Will of the Ancients if u feel your not doing perfect in the game, you should probably go for Rylais crystal scepter first. Last two items are situational. I like to go for Morello's Evil Tome and Void Staff. With morelo's u have +-45sec cd on your ulti and who wont like some extra magic penetration!
The truth is that ordinary im not getting behing my Will of the ancients/rylais crystal scepter.