Bind him

The succubus stepped over to one of the flickering mystical torches and grabbed the dark metal there. She seemed to pull a chunk of metal from the sconse effortlessly. “What? How?” Marco asked.

She smiled, “I generate magic differently to you. I still have power,” she explained.

“You mean you could have banished that fucking banshee yourself?” he demanded.

“Certainly, all you had to do was command me to do so, but you didn’t, and now, you are mine.” She stepped back over to him with the metal in hand and reached down to his cock. She whispered something Marco could not hear, and the band sprang to life. The metal stretched around his cock and balls, holding him tightly before becoming decorated with runes. Marco moaned as pleasure ran through him, and he grew hard.

“There,” she said softly, “now you won’t go limp. You will be able to cum again and again, and all at my whim.”

“And if I don’t?” he asked.

She raised a hand, and he felt a strong electric current run through his junk and the band tighten slightly. “I will get enjoyment from electrocuting and castrating you, but I would rather you put that cock to good use.” She turned to leave before stopping, “Oh, one last thing. That band also is enchanted to make you fabulously fertile, and you will be capable of impregnating any female creature. In addition to that, any woman who sees it, other than me, will be enchanted by it, desire to taste it and feel it. So, you should be careful, or there will be lots of your young running around, each of them demon tainted.”

He blinked for a moment, “And you will be able to use your bond to those young to prevent yourself from being banished.”

She smiled, “Thank you for agreeing to this, by the way. The school is currently full of fertile young women, and demons and monsters which will similarly want to try you on for size. And speaking of which,” she lay down and spread her legs. “You can start by exercising that tongue.”