Talk:Katarina/@comment-129.119.164.118-20110206010645/@comment-3217613-20110206173723

Take a look on items and you'll see that AP is also much cheaper than AD.

Long Sword -> 415g -> 10ad Amplifying Tome -> 435g -> 20ap

Also, AP items tend to give more utility stats, suchs as healh, slow (rylai) or magic resist.

AD items tend to give offensive stats such as lifesteal or critical chance that are useless on kat.