Naruto: My Summoning Beast Is Uchiha Shisui

A third-rate spirit medium is unexpectedly reborn into the Uchiha clan in the world of Naruto. Before I can even enjoy the good life, the older brother who adopted me kicks the bucket. The problem is, it seems like a lot of people are lusting after my eyes and my body. What do I do? Asking online. Wait, does this world have spirit mediumship too? It doesn't seem to work the same way as what I learned. No matter, I know my former teacher's book, The Ultra-Ultra Concise Guide to Divination, by heart. Watch me adapt spirit mediumship to this world!

“Spirit of Fire, Katoobutsu! Spirit Integration!”

“Over Soul, Shisui! In, Kusanagi-no-Tsurugi!”

Still can't win. Guess I'll have to try this:

“Over Soul, Sage of Six Paths! In, Kusanagi-no-Tsurugi! In, Ama no Hoko!”

Let's see who in the shinobi world dares say spirit mediumship is only good for raising pets now!