I am a Cestus Sprite living within this book. As an Eternal Guardian, only you can hear me," boomed the book.
"Prove your worth, and I will bring out the power of a cestus for you. However, you must bring me the materials I require."
"Kill the shadow Sagharra summoned in the Trial of Malice Ruins.
So for the cestus, you just have to kill Sagharra and nothing else for that one?