The Transmigrators Regression

The protagonist uses his unique trait and transmigrates to an earth like world. He possesses an another version of himself, to gain the knowledge of this world and escape his faith, however he soon finds out that there is no magic in this world, furthermore whenever he would transmigrate the other persons ego would stay, so now there are two of them fighting for control in one body. Will he be able to find what he is looking for before his time runs out?, and escape what has already happened and what is destined to happen?.