So i remember this novel i read where a guy comes back in time (rewind of 10000 years or something like that) and he is sold as a slave to some lady who is studying formations/inscriptions/talismans or something like that.He was a genius in his own time and was very advanced in this so helps this girl and his inscriptions are crazy good and is highly efficient.That's all i remember.
Miracle Throne it is. But I don't think you can finish it as the novel is discontinued by the author.