User blog comment:Godisme/Everything But The Rain Op. 2 "The Rudiments"/@comment-2120712-20130307111953

Kugo kike Zaraki could of pulled a zan off of a dead Shinigami only maybe in the human world. I think Ichigo was able to make a Zan on his own because of his quincy heritage. They specialize in creating spirit weapons. Combine this natural ability with whatever he got from his father and Rukia, and what turns into an ability to make bows and arrows turns into an ability to make your own Zan which means Zangetsu is part quincy weapon. It also explains why Ichigo took all of Rukia's powers, because he subconsciously activated his quincy ability to take foreign spirit energy kicked in and caused what happened to happen.