hendra_gunawan_8460
Your idea about the spirit in the weapon is very good. I want suggest some ideas from “Reformation of the Deadbeat Noble”: I found they have something very similar to a Magus (thaumaturgy) in the novel/manga and the protagonist Irene Perreira can magicaly create a copy of his friend to learn their sword style in some training field he created with his magic similar to a Reality Marble.