Hello everybody I'm Darklancer and this is my first guide on Mobafire. I've made this build for Sona basically to show what a great support she is. Personally Sona is my Favourite champion to play in ranked games because of her strong ultimate ( Power Chord) and the ability to constantly have aura's on your teammates, so even if you have no mana you are still helping.

Hymn of Valor Your harassing skill in the early game. When cast there is a blue aura around you. This boost the AD and AP of all surrounding allies. When cast on your third spell it triggers Power Chord and allows you to do twice the amount of damage power chord would usually do.
Aria of Perseverance This is you heal spell. When cast there is a green aura around you. This boost the Armor and Magic Resist of all surrounding allied champions. On third spell cast, triggers Power Chord which this time will lower all damge dealt by tht champion by 20% for 3 seconds.
Song of Celerity This is your spell which boots movement speed. When cast there is a purple aura surrounding you. This boosts the movement speed of all surrounding allied champions. On your third spell cast, triggers Power Chord which will slow the enemy which you hit for a few seconds.
Crescendo Sona's ultimate. This allows Sona to stun all enemy champions hit by this spell. This does not contribute to power chord.

Pros
•Excellent harasser early game
•Great AOE stun
•Able to heal allies and boost their movement speed
Cons
•Long cd on heal
•Mana problems in early game
•Fragile

You Work Well With

Nunu & Willump
Annie
Fiddlesticks
Brand
Blitzcrank
Gragas
Kennen
Miss Fortune

People Who Work Well With You

Jarvan IV
Amumu
Anivia
Cassiopeia
Gangplank
Leona
Malphite
Basically you work well with these other champions because they have skill(s) which allow them to initiate and then you follow up with Crescendo or you initiate then they start using they're skills. For example,
1) Sona Crescendo
2) Fiddlesticks Crowstorm
OR
1) Jarvan IV Cataclysm
2) Sona Crescendo

Because you are playing support, you will be laning against the other AD carry so Greater Mark of Armor armor marks will greatly help you survive and tank a bit for your friendly AD carry. As in the early game you will have trouble with your mana, so you will need mana regen Greater Seal Of Replnishment to keep constantly healing your ally. CD reduction glyphs Greater Glyph of Scaling Cooldown Reduction is a good choice so that in the late game you will be able to use your ultimate as much as possible. Your quints Greater Quintessence of Mana have the same explanation as the seals.

MY CHIOCES

Clairvoyance- You are the support so cv is a must.

Flash- Great to line up perfect stuns or to escpae, especially since u are not very tanky

Other Spells

Heal- A great alternative for Sona especially since you are a support

Teleport- OK although I wouldn't recommend it.

Clarity- Only useful for early game, you can put it in on 5v5 if you want but not in ranked games.

Surge- Wrong champion for surge. Sona is no hybrid.

Ignite- You are a support, not a killer

Exhaust- It can be good, but I also wouldn't recommend it. Leave your solo top or AD carry to do the exhauting

Ghost Promote Cleanse-Nah...

Revive- You mad bro???

Smite- Stop trolling -.-

Your early Mana Manipulator is important as your mana pool is not very high early game so this should solve your problem. This build is aimed at providing your team with auras, speeding them up, and slowing down your opponents. As a support it is always important to get gold per 5 items such as philosopher's stone , Heart of Gold , and kage's lucky pick . In a team fight, always remember to use your shurelya's revelrie to speed up your team mates and randuin'somen to slow your opponent. Use your Deathfire Grasp as well to help with your team's damage output

In the early game your job is to heal your ad carry and just buff him/her up. The moment you hit your third spell cast, cast Hymn of Valor and hit the opponents AD carry. At the beginning of the game, Clairvoyance your opponents jungle and try to find out where their jungler is starting. At about 3.30, ward the bottom lane with your Vision Ward . This will allow you to destroy your opponents ward and waste their money. Always communicate with your AD carry and ask him/her at the beginning. "Do you want me to get Hymn of Valor or Song of Celerity at level 2". Also try to warn him in advance when you see someone coming in to gank. And always try to use your mana sparingly. Usually try to keep your green aura on so that your ad carry will have not suviveability. And when chasing or going out to lane, always use the purple aura.

As a support, always remember your job is not to kill, but instead to support your teammates. Don't forget to constantly buy wards and ward the jungle, dragon, baron and likely ganking spots. Also remember not to hit the minions so that your AD carry can farm properly.

Always try your best to line up your Crescendo to stun the maximum number of people you can. If you have an Amumu or Annie or any other people like that, discuss with them how you are gonna line up your stun to maximize your use in team fights. Also, use flash to aim your stun nicely or catch someone off guard.

My Chioce of Ranked Game items

Ionian Boots of Lucidity This is so tht you can maximise your Crescendo usage
Shurelya's Battlesong It has a nice GP5 effect and also allow you to activate it for a burst of movement
Locket of the Iron Solari Again another GP5 item and also allows you to give auras to you and your teammates
Deathfire Grasp Also the nice GP5 and also adds to your team's burst damage
Soul Shroud Gives mana regen, not only to you but your whole team
and with extra HP also
Aegis of the Legion Has a nice aura for you team and gives HP, Armor, and Magic Resist

Alternative Items

Banshee's Veil If you seem to be getting targeted first this is always a nice item to have
Archangel's Staff You can play this in classic if you want but not recommended for ranked game

14/2/2012- Swapped out Randuin's Omen for Locket of the Iron Solari

Sona is my Favourite support and I hope that you all enjoy her as much as I do. Thank you all for reading my guide and I hope that you have all found this guide useful.