Talk:Kennen/@comment-13444593-20160403134415/@comment-4091261-20160405060131

The base damage rule is pretty much based on how much you would get as an  bruiser. What it basically means is that if the ability can't even get the same amount of damage output using as its base damage, might as well invest in magic penetration instead of.

That said, it does apply to other champions. Exceptions are supports due to healing, shields, and other utility that has ratios being entirely unaffected by magic penetration. You'd be suprised how many mages actually benefit more from magic penetration-- being an example with the exception of.