Only remember that I read a bit of it then maybe forgot or dropped it and now I want to get back into the story. Basically about a boy who ventured into some dangerous place because he coudnt cultivate and to get a herb to give to his sister? so she can get accepted into a sect when the immortals came to recruit people. He got an old grandpa to help him, since he set up that dangerous place. Also after he came back with the herbs, turned out his friends and sisters had peerless talent and the sect took them away, then he went with grandpa to cultivate. Last things I remember is that the cultivation system had colored lotus petals on forehead and taking faith of mortals helped you cultivate much much faster. Thank you for the help if you know the novel.