Talk:Kassadin/@comment-75.42.68.223-20120422220400/@comment-88.186.19.90-20120422223752

It gives mana back when you AA (so you don't need that much mana sustain), it lets you charge your Force Pulse and Tear of the Goddess. It gives some great DPS when finishing off an opponent. The ratio is pretty good, the damage bonus makes it much easier to last-hit under your turret, and it makes tanky+AS+AP Kassadin possible and viable.

That's why.