Shyvana is very good melle ad champ cause of Q with every hit reduse its cd
she need ad/as/lifesteal and i belive the frosen mallet is good for chacing with w(mov speed)

Pros
Early feeding
Good at teamfights
No mp
need fury to use ulti that are easy to take (2 per hit)
Q has low cd if u have as
W give good movm. speed

Cons
lose easy hp
her only range ab can me dodged easily from minions

better dont be the 1rst at team fights.
Stay back and wait to use ulti if u want sure kill and take the enemis 1 by 1

be carefull ulti better take the enemy back for dmg and be close to u if u want the kill

Good luck Have fun and remember it's only a game.......