Headmaster:
I’m afraid there is nothing we can do for Sebastian; the prophecy was unequivocal. He is destined to be killed by a powerful demon ... a fate confirmed by two other seers.
He is a good boy, a true Slytherin who refuses to bow to any system or believe in prophecies, yet he is afraid. He doesn't show it in front of his friends,
but the truth is, he is terrified of dying. The trouble with divination is that the more people believe in it, the more certain the predictions become. How can we relieve his fear?
We tried by giving him specialized training in Defense Against the Dark Arts, but Lord Eni — that succubus girl posing as a boy — undermined those efforts.
Sebastian lost a duel against a "newcomer" and is now genuinely afraid he will die in a few weeks.

What is it that makes this Succubus so strong? Could she be the key?

Lovenia (Lord Eni):
Sebastian has become a good mate. We sit together in most classes, and I’m slowly beginning to understand how boys think about girls. Boys get totally rattled because they feel
attracted to girls, even though girls are supposed to be so much weaker. Once, over a butterbeer, he confessed how impressed he was by the way I just shrugged off his *Stupefy* spells.
I didn't tell him that I simply don't like defending against attacks ... I’m into pain and dislike shield spells because the pain turns me on.
I told him shields were for girls, and I think he thought that was pretty cool. We’re going to train together on how to take electric attacks. I need to teach him breathing techniques ... how to breathe through the pain and, above all, we need to practice. 

Sebastian:
Eni is cool. At first, I thought, "What an androgynous Hufflepuff weakling" but he takes a hit and just gets back up with a smile. I want to become just as strong as Eni! If I want to
hold my own against the demon, I have to be prepared for anything, and no one here teaches us how to really handle taking a hit in a serious situation. Eni definitely doesn't belong in Hufflepuff ... I wish my buddy were in Slytherin ... but we’ve been training daily now. I told Eni about the prophecy and hope to kick fate’s ass, though.
I don't really believe it’ll happen. I have to trust in myself.

Lovenia (Lord Eni):
I’m training with Sebastian. I taught him the following, and I hope it gets burned into his subconscious:
Left hand, one finger extended: It hurt, but no problem.
Two fingers: It hurts; we’re still in the game.
Three fingers: Break, please, or slow down.
All fingers: Stop immediately! Something is seriously wrong ... STOP!!!
I practice this with him, ... one or two fingers games... but once, I fired a real Tamriel lightning bolt at him, and he showed his whole hand. It looked like a reflex, and I’m glad he’s
internalized it.

Headmaster:
That stupid succubus brewed me some Polyjuice Potion, and I’m sure she thinks I want to take on her body to do the kind of perverted things she does. I am an Archmage; why
would I need something like that? The stupid girl should just learn how to brew Polyjuice Potion properly. Used correctly, she could transform into a terrifying creature; if she then
spreads her wings and drops the illusion of the horns and succubus tail, she’d take on the form of a terrifying demon. The plan is to put Sebastian in a situation mirroring the prophecy, 
while we can control it. He has to believe the demon is torturing him... to death. But only *almost*...
and we’ll be standing by to save him. The prophecy gets fulfilled and Sebastian lives... provided the stupid Succubus learns how to inflict pain until someone breaks, and how to recognize 
the exact moment before he dies.

Lovenia (Lord Eni):
The Headmaster explained his plan to me a while ago. I know he transformed into my body and fondled himself to orgasm in front of the mirror — but hey, I would’ve
done the same thing if his body turned me on. Anyway, we’re trying to cheat fate. It’s awesome and kind of arousing to fuck fate ... and I’m going to save my best friend Sebastian so he’ll have enough confidence in case any Daedra ever show up in his life again. Still, I might have to leave the school afterward. Hopefully, Sebastian remembers the hand signals; we also talked about how a fake death only looks realistic if you’re convincingly pushed to the limit. So much could go wrong, but I’ll risk everything to help my friend.

....

...

..

.

Sebastian (some weeks later in the Hogwards hospital):
I’m alive — I’m actually alive! Thanks to Eni, I collapsed just before I would’ve really died... where’s my buddy?