>>31636844>Black Kyurem = +40 Atk, +10 Def, -10 SpAtk>White Kyurem = +40 SpAtk, +10 SpDef, -10 AtkCombine the positive changes from both fusions and you get
>+40 Atk, +40 SpAtk, +10 Def, +10 SpDefThat's +100, the same as Megas and Primals. So I'm guessing it's going to be a Primal-style forme change, where you put both dragons into an item and then give it to Kyurem to hold.
Maybe mono-Dragon with an ability that lets its attacks ignore resistances and immunities (on top of the Mold Breaker effect).