Dion, Bahamut's Dominant // Bahamut, Warden of Light

A token that is created as a copy of a double-faced permanent or a double-faced card in another zone is a double-faced token. It will have both the front face and back face of whatever object it's copying. If it's copying a double-faced permanent whose back face is up, the token will enter with its back face up. It can transform if instructed to do so.

If the target permanent is an illegal target when Bahamut's third chapter ability tries to resolve, it won't resolve and none of its effects will happen. You won't exile Bahamut and return it to the battlefield front face up. Instead, when the ability leaves the stack without resolving and state-based actions are checked, Bahamut will be sacrificed due to having a number of lore counters greater than or equal to its final chapter number.

Each face of a nonmodal double-faced card has its own set of characteristics: name, types, subtypes, abilities, and so on. While a nonmodal double-faced permanent is on the battlefield, consider only the characteristics of the face that's currently up. The other set of characteristics is ignored.

The mana value of a nonmodal double-faced card is the mana value of its front face, no matter which face is up.

In the Commander variant, a double-faced card's color identity is determined by the mana costs and mana symbols in the rules text of both faces combined. If either face has a color indicator or basic land type, those are also considered. For example, Cecil, Dark Knight's color identity is black and white, since its front face is black and its back face has a white color indicator.

Each nonmodal double-faced card in this release is cast face up. In every zone other than the battlefield, consider only the characteristics of its front face. If it is on the battlefield, consider only the characteristics of the face that's up; the other face's characteristics are ignored.