There's also the novel "the last X," (just search it on google since its not on Novelupdates.) It is a world hopping novel, unfortunately, the author hasn't continued since 3 years ago. There's about 6 arcs I think? Warning, ML has a huge brainhole, the head below functioning more than the one on top of his shoulders. He has thick filters for MC who sometimes I mistake for a child with how he behaves and how ML basically is seduced or gushes over his loveliness. Damn it, the arc that was discontinued was the one that made the most impression on me too.  I hope it gets completed someday.