Talk:The Black Cleaver/@comment-108.18.96.222-20121205105549/@comment-4882515-20121205193354

Reduction and Penetration the same? Before you call someone a smartass, maybe you should do a little research.

Reduction reduces the actual stat. For +30 reduction, a target with 100 armor will become 70. Any attacks from allies will benefit.

Penetration just IGNORES the stat. With +30 penetration, a target with 100 armor will still be at 100, but you ignore 30 points. Your attacks will be stronger, but your allies' attacks won't.

I do agree that putting in on Wu would be pretty damn deadly, especially if you follow the Q with the Ult. Little more worried about Darius though. His % armor penetration, plus Last Whisper AND Black cleaver just screams dunking.