Transform into different forms and gain mana based on your ranking. As long as your skills are strong enough, you can create whatever you want.
You can fight from a lower dimension against a higher one, or modify things from a higher dimension. Anything is possible.
Lin Ruo was a man in her previous life. In her last incarnation, she ended up as Haruno Sakura in a fanfic. Thanks to having read a novel where Sakura mastered the strongest Water Release, she became so powerful that even Madara said, “When it comes to Water Release, you’re the strongest.”
But the story later got nerfed, and in this life, she vows to rewrite the fate of Water Release losing to those who cheat.
Her declaration: “If the River God can control the galaxy, there’s no reason the Water God should be weaker! In this life, I’m the God of Water. Besides, I write novels so badly I could make your head bubble over.”
Warning: The protagonist is a little perverted and somewhat useless. She plays the part of an innocent goddess in public purely for the thrill. Expect a water-themed Emperor’s New Clothes, dressing up in holy light, and forcing herself into things for excitement, among other pursuits.
If that’s not your thing, don’t read.
I wonder if the author is immersed in his art?