Now that everyone was safe and sound in the Pegasus, Uriel finally had some time to check his newly acquired exhibition. At the time, he didn't have enough flux energy to fight and he spent all of his money and most of his company's money to unlock the Pre diluvian exhibition which resulted in him being able of using the book of the dead.
While he couldn't argue with the results, he deemed the ominous book too dangerous to leave it in the museum unattended now that he knew that Water warlock was somehow able to steal his artifacts. Because of that, he decided to take it out and put it somewhere safe inside the zeppelin but no matter how much he tried, he couldn't take it out from his trait like he did the day before.