So, i will tell a little about her.
Shyvana is an Half dragon, Half girl (a hot girl xD?)
Shes good lane presser, one on one and 3v3 and 5v5 char..
After my mind shes good whet a mix whet, attack power, apility power, life steal and Aoe Dmp..

Shes Aoe are good to press lanes and killing players. Her Q spell, hits after her normal attack 80% of her attack, and its works on turrets. Her E spell are an fire bolt she cast, im only using it to irritate players when im not in the Dragon form. Her ulti makes her to a dragon, thats makes her spells a little differend. Her Q hits whet a Splash damege to nearby enemies, her Aoe makes a track of fire after her and her Fire Bolt is casting 3 instead of 1 (one in the mittle, one to left, and one to right.. As Ashes arrows and TF carts..)

Farm minions and buffs, in 3v3 movement and sloving buff (White and Red)very good for her.. And the Attack buff (Green) are good for any melee, so go for that too. And in lvl 10, u should could take the dragon down whetout using ur true form..

I am using Flash on D and Ignite on F
Flash: Because its so good to her when shes in dragon, to get close whet ur AOE and u can use ur Q spell..
Ignite: Because its an very good to take a player done one on on, and on one two, because healing in reduce on target.

Theres items ive taken i know are a little from two other (http://www.mobafire.com/league-of-legends/build/shyvana-build-quot-dragon-*****-quot-144370, http://www.mobafire.com/league-of-legends/build/shyvana-the-legendary-dragon-144169). But i did chance it a little, and its works for me.

The runes are good for her.
Dmg, Hp and AS are good for her whet the Life Steal ive made..

I haven tried the full Masteri build yet because imonly lvl 17, but if anyone try id, please tell me how its works whet her :)