Dimension Erosion, but I Became the Last Leader of Lei Ninja

It's probably half fun, half plot, half abstract, half with multiple female protagonists. Latitude erosion came, and all kinds of underworld things appeared from nowhere and attacked Wang Yanyuan. At the critical moment of life and death, he was rescued by Anna, a ninja from the Rei Ninja Sect from outside the world, and awakened his ninjutsu ability. From then on, he embarked on a journey of exploring various planes, meeting other awakened people and learning ninjutsu. (I have made a lot of changes and secondary creations to the effects, power system and background story of the Lei Ninjutsu. Many of the Ninjutsu have the same name and have nothing to do with the original Ninjutsu of the same name. This is based on the needs of the plot. I would like to apologize to the seniors who really developed these Ninjutsu.) There is the Rei Ninja sect here, but it is not the only Rei Ninja sect. There is also the Green Dragon, White Tiger, Suzaku Xuanwu. There is weirdness here, but it's not just weirdness. There are also treasure hunts in the East China Sea; elbow-butting cults; strange stories about rules; Beria's battle with Gu Qinghan; Confucianism, Buddhism and Taoism's verbal battle with Socrates... Some places may be slightly scary, and some places may be a bit underworld. (But I guarantee that the plots related to the heroine included are from the human world) In short, this is the first book by a new author. It is a work in which both the author's work and the protagonist will grow rapidly. If you want to witness this growth, you can come in and take a look, maybe you will like it. Ps: Anyway, it's considered a success if you, the readers, laughed at it. PS in PS: An angry laugh counts as a laugh.