manipulation of his ki/soul/mana - ki blasts body strenghtening , soul enegy based spell (kido) , mana bending the elements fire,earth,water ect... not so good on the side of forming proper spells like teleportation , invisibility ,scrying ect... as for the dagger like a zanpakto it has too release forms 1st being a set of gauntlets and greaves 2nd the bankai being just pure soul engery that coats him and can be used to further strengthen his body or be formed into a weapon/constuct(susanoo) to aid in battle. as for the daggers ego it has a "demonic" form(hollowfication) that can be relased to further the power up but doing so dose send him into a somewhat controled rage as long as hes the one relaseing the form but if a near death experince or something emottionaly strong enough forces the daggers to take over a berserking demon get set lose and stop any and all thing inbetween and around it(her) target.