Seventy-two spirits and one corrupted summoner. Whatever his plans, One had planned to fulfill whatever demand her master had of her, until she discovers the truth behind her summoning.  Thirteen is summoned and discarded in the same breath. Her summoner has ripped her away from her home and stolen everything she was. She certainly was not going to let him go without proper punishment.  These two spirits have been summoned by the same man, but while he is but a mortal, he hides a secret that might threaten everything they are. The problem is, they have to obey him unconditionally or be sentenced to eternal damnation.  Whatever his goal, One knows she cannot let her master succeed. And no matter the rules, Thirteen will have her revenge on the insolent mortal that summoned her. But what if the secret he hides is beyond what any of them could have imagined?  Author's Note: This is loosely based on the "Ars Goetia", I make no promises of accuracy. Also, this is a Wriathon fiction, so the focus will be mainly on completing the challenge at the expense of detailed and thorough editing, which, depending on how things go, will be done once the Writathon ends, or I completed the word goal, or the story concluded.  [Writathon Participant 2024]