Either he’s had one this whole time and it’s a winged mythical zoan fruit.
Or he’s stealing Kizarus fruit
Or he’s stealing Kizarus fruit
Enel fruits being taken because of him being another winged freak like him, makes sense to me.
I say Enel because if BB is after one of the weapons of mass destruction, then having a guy that can generate lightening would make sense. Only if one of the weapons is a warship