I’ve been a member for 8 years, and this will be my first review on MDL. That is how much this drama has affected me.
I will review base on MDL’s point
1. Story. At first, it seems like a typical xianxia drama. A ruthless demon, and a goddess trying to save the world. But after the first 2 episodes, you will know that this is different. The demon is still a human, a powerless and abused human who’d suffered throughout his entire life. Has no friends, has no family, and because nobody has ever show him love and care before, he also has no feeling. Story buildup and character development are good. 
Unlike other xianxia, this one has no tribulation, and only one lifetime. Every character has their memory throughout the whole story (I hate memory lost trope). There is a bit of time travel involve, but nothing too complicated. The story flow is smooth and connected. Watch this story with xianxia logic, not our world logic.
2. Acting/Cast. This is my first drama for LYX and BL and I shipped them already. The chemistry is ON FIRE! And I found out that they were in another drama before this (Love is Sweet) and they are already well known for their great chemistry. In this drama, the actors has to emote a lot of different expression, especially anger and despair. I would say the star of the show is LYX, because of how complex his character TTJ is. Is he good? Is he evil? He has to be both. And he played it convincingly.
As for BL’s character, thank goodness for a smart FL. I really need a sensible FL that doesn’t think and talk like a child. 
There is also no annoying side characters, SFL and SML were ok. I know there is a lot of hatre for YBC but a drama has no purpose if there is no good villain. CDL’s acting was passable, not great, not memorable, not bad. I don’t want to dwell too much on side characters, because the limelight is always on the ML and FL. Ohh..but Pianran is very cute.
3. Music. This is an easy score. The OST is so good. I was so happy to hear LYN’s voice in the opening theme. My favourite is 寄长月 by Bu Cai. It’s so sad and beautiful, just like this drama.
4. Rewatch Value. I am really not sure about this one. I might increase the store after I finish watching today’s last episode. If this has a BE, I don’t think I can rewatch TTJ’s suffering over and over again. That will make me a sadist to enjoy watching that.
Edit to change. At first I gave this drama a 6 for rewatch value. I love this drama too much, and I AM going to rewatch.

What I don’t like about this drama
- make up, hair accessories and blood. The make up team really went overboard with LYX’s make up. Go easy on the red lipstick. Go easy on hair accessories on YXW and the blood spitting too.
- Editing. With C-Drama, we are very used with slow burns, but this drama is too fast too furious because they need to fit in so much stories into just 40 episodes. Some scene and storyline were cut out. I need to read the webnovel and discuss in MBL drama page to understand more about the story.

Yes, this is by far the best Xianxia that I’d ever watch. In my book, this even top TMOFPB.