Cecil, Dark Knight // Cecil, Redeemed Paladin

If you are instructed to put a card that isn't a double-faced card onto the battlefield transformed, it will not enter at all. In that case, it stays in the zone it was previously in. For example, if a single-faced card is a copy of Crystal Fragments, it will be exiled during the resolution of its second ability and remain in exile.

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.

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 Cecil, Dark Knight is dealt lethal damage at the same time it deals damage (probably because it blocked or became blocked), its last ability will still trigger. You'll still lose life, but you won't untap or transform Cecil, Dark Knight because it won't be on the battlefield anymore.

The back face of a nonmodal double-faced card usually has a color indicator that defines its color.