User blog comment:Shadow Dancer/Possible upgrade for Haunting guise/@comment-74.75.167.105-20120625224035/@comment-3968210-20120626084402

This is an item made to counter champions with some extra magic resist. It's also made to give more choices to a caster, so that it won't have to build Sorcerer's boots in every game. It's an item which can be taken by glasscannons who need CDR (lux, for example), as well as more tanky mages (Morgana).

At the moment, it's useless as a supporting item but I may tweak it's stats a bit to make it a good choice for supports as well.