I have recently discovered I can fuse my spirits into one of my body parts but I only fuse them into my arms as I look like this.
((The black and purple is Sadoichi the white is Zangetsu))
Most of my attacking power comes from Zangetsu as Sadoichi defends but I can also switch the forms of Sadoichi into an attack arm like so
((Ignore the bow and arrow))
Bankais (or transformations)
Sadoichi's Bankai. My darkness moves are charged at a extrodionary level in this state i can only use darkness and lightning moves
Zangetsu's Bankai. My light moves are charged at with overwhelming amount of light energy in this state can only uses light and ice moves
When i let the chatic enrgy take over my body all my abilities and what not are increased by 50 fold. each eye on my shulder has a unique ability. the left eye frezzes the emey instantly at first glance for a short period of time (1 post) as the right eye allow me to deflect and covert the attack to energy
Zangetsu Sadoici True Bankai (most likely i'll do this when i have my three secton staff but sometimes i just go into this form) All my elements are pushed beyond it's limits given me new powers of sorts (i'll explain this more when i use it in battle)
Vizard Mask
basiaccly my normal aperance but speed strenth and what not are incresed 50x. used with my any of my bankais means double the power i posess