EXM? The God Fell into a Mary Sue Trap!

Immortal Emperor Adrian Vale is trapped in a cheesy romance novel as its most pathetic character. Ridiculed as talentless, he discovers this world is a trap by an ancient mirror. Using his god-like knowledge, he breaks the novel's rules to hunt the cosmic killer who sent him here. Can a吐槽帝王 tear apart a world built on bad writing?