The truth about the succubus.
"Hmm, if you want me to listen to your story... then you have to do a little something for me." He said after a short time of reflection.
"What do you mean by that?"
"Well, it's very simple..." later, all his attention was focused on Sabrina. "Sabrina, do you still have the potion you gave Yuer?" He asked.
"Yes, master, this is not a problem. I have enough truth potions for every student who is at the tower!" She replied by taking out a mixture of the same color as she had given Yuer. "It's a potion of divine rank. After ingesting it, I would strongly advise you not to lie for your good." She continued with a satisfying smile. Celestia's misfortune naturally made her happy.