Board Thread:General Discussion/@comment-4957813-20131130185522/@comment-25032153-20140710005602

they are seperate as mention in this Arc because the Hollow and Quincy cant merged power because they are destroy each other as shown in the first arc when Uryu was destroying hollows with his quincy bow that explains why ichigo has the two blades though they are the same source of power as they are the different side of the coin as well.