/
To get a note you need to use this command.
/trigger bizcub.deathnote
or
/function deathnote:deathnote
For it to work, you need to open the notebook, write the nickname exactly and click done. Immediately after this, a murder will occur.
To craft a Death Note you need 8 ink sacs and a book with a quill. (1.20.5+)
!preview

Mod or datapack allows you to write names in the Death Note!