Not great. READ THE NOVEL INSTEAD.

I'll make it short: Just go and read the NOVEL. The novel is absolutely beautiful and many many MANY times better than the drama. The whole drama is like 1/20 of the story in the novel and it has a slightly different... theme and feeling to it. It's a beautiful cultivation story about Qin Wentian and how he rose to power of all realms and etc. you know the vibe. The casting for this drama is probably one of the worst in xianxia novels' adaptations. Just save yourself from the trouble and go read the Ancient Godly Monarch novel instead