Someone suggested that perhaps the Razielim weren’t destroyed, after all, Kain didn’t kill Raziel in a fit of jealousy, he had a plan! Maybe he told the Razielim about it, and they all went and hid away for a while, and they actually survived in a corner of Nosgoth and lived long enough to evolve wings!

I tried to imagine this scene, of Kain explaining to the Razielim what his cunning plan is. This is the result. Hope you think it funny too.

I advise reading it aloud (with voices) for optimum effect.]

Kain: Raphael, I've been expecting you.

Raphael: Good, it would not be fitting for a man like you to die unprepared.

Kain: (laughs) And do you really think you can destroy me, Raphael?

Raphael: Do I have any choice? Our master is dead, cast into the abyss on your command, like a common traitor. And this after a thousand years of faithful service to you. He committed no treason, Kain, and his only crime was that he hurt your damnable pride!

More Razielim drop down from the high edge just under the dome. They move to surround the little elevated arena now occupied only by Raphael and Kain.

Raphael: You cannot escape, Kain. Your faithful lackeys are out hunting humans, our clan holds the sanctuary, you have nowhere to run. Now, prepare yourself. I shall not let Raziel's death go unavenged! 

He raises his weapon, but hesitates to strike. Kain is still sitting down, and Raphael wanted a straight fight.

Kain: (annoyed) And do you really think I had not foreseen this? Do you think even a horse can fart in my empire without me knowing about it? I can see all, Raphael, and I know that Raziel's part on this world's stage is not played out yet. 

Raphael: (Threateningly) Enough of your lies, Kain. Raziel is destroyed, I saw him fall into the abyss with my own eyes!

Kain: (Kain gets up while he talks, tossing his cape behind him with an angry gesture, and circling Raphael slowly) Your eyes see only what's right in front of them, and that badly. He fell into the abyss, yes, but it did not and will not destroy him. I can see through time Raphael, I have studied all possible futures, all conceivable pasts, and I can assure you, your master will return. 

Raphael narrows his eyes at Kain, but he wants to hear the rest.

Kain: Listen, my child, his latest transformation only confirmed what I have suspected for a long time. Raziel is far more important than any of you can imagine, and far less easy to destroy. He is the hero from an ancient prophesy, the one who will restore balance. One day, he will return to this very room, for much the same reason that you are here now. Together, we will travel back in time, and twist the strands of history so badly that time itself will lose track of us, and vampires long since beheaded will come back to life without breaking a sweat. Then, finally, balance will be restored, and Nosgoth freed from its madness and corruption. 
 So you see, it was not to save my pride that I sacrificed my firstborn son, but for the redemption of all of Nosgoth.

The Razielim are confused. They look from each other, to Kain, who has spread his arms wide in the heat of his speech, to their leader, who hesitantly shakes his head.

Kain: I will need your help for this too, Raphael. For this plan to work, it must appear as though you were wiped out completely. Gather what’s left of your clan, Raphael, and hide. Hide under a big rock, until the world has forgotten about your existence and Nosgoth is all but completely destroyed. Only then can the strands of time be rewoven to create a different future -- a better future, for us all.
 

[At this point, let us consider two possible reactions from Raphael. Perhaps he understands all this, (unlike most of us) and trusts Kain to do what's best in the end:]
 

Raphael: Oh, well, if that's your plan...

The Razielim agree: "yeah, that sounds reasonable" - "we didn't know there was a plan behind all this" - "that's all right then" - etc.

Raphael: So, er, we'll go away then. So sorry we disturbed you, lord. Bows. Don't worry, you won't see us again...

The Razielim scuttle outside, Kain laughs contemptuously.
 

[Or, perhaps, it would go something like this:]
 

Raphael: You must think I'm simple! Hide and wait for our lord to return when we know him to be utterly destroyed? You cannot deceive us with your fairytales, Kain. The hero of prophesy indeed! Do you think you can manipulate us that easily?

Kain: Mutters: Well, if your master's anything to go by...

Raphael: This travesty has gone on for long enough! En garde, Kain!

Raphael throws himself upon Kain, who, without even drawing the Soul Reaver, dodges his blow, wrenches the spear out of Raphael's grip and impales him on it with a heartfelt "Vae Victus". He then proceeds to slaughter the rest of the Razielim, gorging himself on their blood, feeding their souls to the Reaver and punctuating the choreography of this bloody battle with his cynical little laugh. When they are all thoroughly defeated he calls in the Malchahim to clean up the mess and they all go and have a big vampi-barbecue outside the sanctuary.