It was a room with no windows, no doors, and no stairs and corridors leading to this room. Aielster Crowley was floating upside down inside a cylindrical machine that has kept him alive for a very, very long time.
If Touma had performed his snap to bring Misaki back to life on Earth, the microscopic changes caused by the backlash would have shattered his carefully constructed plan to rid the world of magic. He thought he understood what Touma's right hand was, but what Ladylee said to Touma about gems forged by personifications forced him to reevaluate what he knew about Touma's right hand.
An unassuming woman in a purple cloak emerged from a black mist.
"Do you wish to die?" said the woman.
"No. Are you Mistress Death by any chance?"
"I am."
Aiwass may be a transcendent being with immense knowledge about magic, but Mistress Death was part of the knowledge herself as a personification of one of the fundamental aspects of the Universe. A god that participated in creating a world that was so easily fooled and could not punish the hypocrites and liars. Although he had mastered magic to the point of being able to kill Magic Gods while retaining his humanity, not even he was above Death.
"Have you come to take me away?"
Mistress Death shot him a glare, like he had just insulted her by asking that question.
"How could I, Aielster Crowley? Not when you've expressed your desire to keep on living. The machines that is keeping you alive, they disgust me. Good day."
A black mist teleported Mistress Death away.
Aielster smirked. Mistress Death had just proven him right when there was nothing she could do to him directly if he didn't want to die. God was indeed not as all-powerful as everyone believed them to be.