User blog comment:Shadow Dancer/Possible upgrade for Haunting guise/@comment-74.75.167.105-20120625224046/@comment-74.233.63.139-20120626140631

Not really it doesn't supply you with enough AP for it to be a good glass cannon item, and the magic pen is more a coutesy then the main point of the item. It's meant to be a viable late-game item by giving you the servivability (300hp), while not sacificing too much damage, with some CDR for a little extra boost, and a nice active that gives you more tankyness then say more AP/M. Pen to burst things down with.