Talk:The Black Cleaver/@comment-72.240.170.192-20130222191544/@comment-24.7.187.204-20130225094251

It's not necessarily bad on her, but Shyvana deals a lot of additional magic damage from her abilities. Burnout (her most powerful move endgame) does magic damage that stacks off of her AD, and the duration increases as she keeps attacking. Twin Bite's cooldown is also reduced each time she autoattacks. So therefore Raw attack Damage and attack speed is her two most beneficial stats.

With the cost of Black Cleaver you could get a high damage (like Bloodthrister)/ attack speed (like Phantom Dancer) item that would translate to overall better damage, or sustain, or both.

That is just my thoughts, though. If BC works great for you, go for it.