User blog comment:Rejuvenation/Anime episode 250/@comment-1677140-20091217175702

Byakuyas parents are dead, Koga is an in-law, and he's pissed at Muramasa for always telling him what to do. Clearly he stabbed him because his Zanpakuto got him in big trouble and being sealed away in a magic tree for hundreds of years sucks ass. Anyways, that's what I picked up, for I have magical cognitive powers, oooooh.