In my previous life, I joined a gang and became the most notorious fighter who killed my enemies with knives. Then I died and got reincarnated. In this life with magic and monster, I have the talent to be both a magician and a warrior. Using the two classes, I will become the strongest. Maybe. I will try a bit in looking for the reason why I got reincarnated here as well. Because I know that it was my master who taught me how to kill in my past life who reincarnated me into this world.
Plot holes, nerfed characters, unnecessary word count like songs(reading music includes a music sheet and even then, not everyone can read a music sheet. Authors should know that reading music is different from reading literature). Mc trait: I am so lucky, all according to plan even when my plan sucks, I am stronk