The fight between Light and Near contunies Light was suspicious about Near changing or doing something to the death note on the Teru so Light took Rem's Death note and send it to the person recently was showing on the news as if they want to take Kira's attention

whatever it has worked you got a letter thay has no name and a book covered in a fantasy novel cover In the letter:

"I am Kira. This death note made for you to kill help me on my future plans, if you try to do anything suspicious against me I will write your name in mine. I know your full name and face. Burn this letter after finishing reading, the Shinigami will explain."

you heard chuckling noise and a black figure come inside of the wall it was Ryuk

Ryuk: "Well, Well! What we have got there hehe~"