Talk:Warwick/@comment-67.208.160.122-20110321201822/@comment-3457312-20110324150251

Though not explicitly stated in the Warwick's tooltip, I believe the Extra Damage is Magic Damage. So you benefit from Magic Pen items.

On the surface he looks like a straightfoward AD champ, but he actually has a lot of hidden magic damage that people tend to neglect or emphasize. His Q is magic damage, his ult deals extra magic damage, Madred's will deal additional magic damage, and Wit's End will deal raw 42 magic damage.