What would you sacrifice to save someone from damnation? The final chapter of “The Good Old Days” puts what may be the final nail in John Constantine’s coffin: preparing to say goodbye to this mortal coil, John’s oddly introspective, brooding over an ex-lover who’s possessed by demons. Since she can’t be exorcised, she’s bound for Hell—unless John makes the ultimate sacrifice and takes her place. Pack light, John—we hear it’s warm where you’re going.