Nothing, no explanation….
Isiah had a reflex to look above him whenever he felt down, he always looked at Emperium when he was in the old globe, and here there was only darkness above him.
It is not like he liked the view, Isiah never liked something hovering above him yet he liked to remind himself of what were his goals.
Isiah read that note a few times more, then closed his eyes, that writing style was not for someone angry or in pain or even hesitant person.
The person who wrote that note was so calm when he did that, but the matters he was discussing didn't seem like good things anyways.
"Everything is a lie," Isiah said as the words kept on being repeated inside his mind.
However after just seconds from when Isiah read those words he noticed that they disappeared right away, it felt like they were wiped out like that message was dedicated to him only, he knew that the previous owner of that grimoire was his older brother but they haven't met even once in a life .