ash_knight17
Ok so we get another twist/creature. This is intriguing, Can only angels see it? Angel of death, maybe? And why didn’t Maddie mention the Bone monster to Cal?
The creature must be something belonged to death reapers which collected the souls. Otherthan that I'm unable to find a different answer. And we all know how our author is, she love to surprise us in the most unimaginable way in the midst of all chaos. So simple guessings are worthless. We will find it soon.