Now that I think about it I remember sword of the occult and avarice blade too. I miss those items dearly.
It is kind of odd because I think to myself and talk with my friends about how broken items used to be (which some were completely busted) but I feel like items in season 7 are still just as strong, they just get nerfed faster. To my knowledge almost all of season 3 or 4 was bloodthirsters right? People would just built multiple bloodthirsters. Death's Dance is an item that is just as broken in my opinion, because its lifesteal is generated from physical damage not auto attacks like normal lifesteal items. As far as I'm aware it is the only item to ever generate lifesteal from physical ability damage. Maybe it is slightly less overpowered because you can't stack DD's but man that item is crazy.
Edge of night and lethality items in general are a good example of this, they were insane, then they got nerfed, and now they were buffed and are still pretty nuts. Duskblade's 99% slow on ranged autos was really fucking annoying on Graves until it got removed of course.
I think I could make a better blog post on my thoughts of league's balance design trends, but I'll do that another time.
TL;DR: Bring back Zephyr pls