Travel Through Mutation and Become a God

Time travel + special forces + fictional history + struggle for hegemony + immortality + gods and demons + mythical beasts + magical powers + all the worlds. The protagonist's double-travel attribute. Main world: the world of gods and demons, where magical powers and magic are common, as well as mythical beasts and beasts; sub-world: the comprehensive world of film and television, starting from the 1960s, I emphasize here that this is not real world history! When the protagonist enters the sub-world, the sub-world also begins to slowly change.