"Something's not right." Aurora told her brothers, who were in her room while they kept looking outside the window to see their father's army, gathering outside.
The rumblings in the building hadn't gone down, and the lava changing color was something phenomenal that Lucifer didn't allow the seer to explain what that all meant before dismissing everyone.
Azazel couldn't place a finger on anything right now, he has been careful to buy his way through his father's heart for him to keep him around, during meetings with different entities that had sworn alliance with hell in these three months that passed.
He didn't do that all for nothing, but rather he did that to be on the lookout for when he will be on his lowest, so he could know when exactly he's going to go into his room, and pass through the secret passage where he had locked away Adrik and Dagan's life force.