Hello everyone.
Im trying to write a scenario here and the plan is to include investigations concerning the Beast House and it's depraved customers. The plot-hook has taken form in an earlier scenario (so this one will serve as a sort of "part two"). The first scenario involved the PC's (who are acolytes to an Ordo Xenos Inquisitor and also an ex-Techpriest to boot) who were sent on a mission the the war-world Kulth were they were tasked to find and secure an Ordo Xenos research outpost that was established there sometime early during the very first exploration phases. Now the world in question is locked in a war against an Ork invasion (and because im an evil gamemaster, the research outpost was located deep behind Ork held lines in the equatorial jungles of Kulth
).
In any case, the PC's managed to find their way there, securd the outpost and gathered as much information and evidence as possible from the burnt out outpost. The learned that the Ordo Xenos Interrogator responsible for setting up the outpost was conducting forbidden biological research on some Tyranid Genestealers that they caught on Kulth, with the help of a few Beast House hunters brought in from off world. Sometime during the research phase the Interrogator decided to steal all the Genestealer samples (consisting of a brood of 12 genestealers frozen in cryogenic tanks), kill all the unecessary bystanders (Biologis personel, Adepts, Mercenaries etc.) and leave the planet (perhaps the Interrogator learned that the world would soon be invaded by Orks and saw an opportunity to be free of the Inquisiton, the PC's dont know that yet).
Anyway, while the PC's were rummaging through the remains of the outpost they were attacked by a Tyranid Lictor (an organism that hade come down on Kulth with the same mycetic spores as the genestealers) and they had to trek back to Imperial lines with the nasty monster at their heels. Eventually they managed to defeat the monster and they burned it's carcass and when they were approaching the Imperial HQ of the equatorial areas (at the same time when the greenskins were sending in an assault wave), their Inquisitor came down along with a contingent of Deathwatch Space Marines by drop-pod and the acylotes were ushered aboard a shuttle for orbit while their master and the Deathwatch beat back the greenskins.
As you might suspect, the plot-hook here is that there are twelve frozen genestealers in the hands of a rogue Interrogator somewhere in the Calixis sector. Naturally the Ordo Xenos will not accept that, and the acolytes are supposed to investigate the latest leads their master has gathered concerning the Interrogator and the missing xenos specimens.
While I do have a larger story in mind (that is supposed to come to it's concluscion in the "part three" episode of this campagin) im going to focus all details on this scenario. The acolytes are supposed to be led to Scintilla, the sector's capital world, where the rogue Interrogator was last seen. His intentions are to sell off the genestealers to some depraved noble juves that are in cahoots with the Beast House.
No, while I have a lot of ideas going here I would like to introduce the almost mythic figure known as Solkarn Senk sometime when the acolytes are investigating the fringe Red Circuses and other Beast House owned locales. Although some of the players do own their own copies of Disciples of the Dark Gods, I don't think they'll actually remember the name Solkarn Senk (after all, it's a thick book with lots of names mentioned
). So I was thinking of maybe just introduce him as a rather innocent looking man with an evil aura around him. Someone who really is the leader is this exstensive xenos trafficking bloodsport organisation, but who likes to observe his work from the eyes of the audience (instead of acting like an archetypical mafia boss who rarely leaves his stronghold).
My intentions are to use him as another plot-hook for future adventures concerning the Beast House, where the players will have the revalation that they have actually met and spoken with the mythic figurehead of this dangerous organisation without really knowing that he was THE Solkarn Senk.
But... I haven't really come up with what the real story about Solkarn Senk is supposed to be. Is he supposed to be a normal human but with an extreme thirst for blood and violence? Is he supposed to be a rogue psyker telepath that has become addicted to the feelings of the thrilled bloodthirsty crowd? Is he supposed to be a daemon in disguise?
I can't seem to think of a cool enough background, so please help me with extrapolating a cool concept. Toss some ideas for me (perhaps even reveal your own spin on who or what Solkarn Senk is?). Im sure that if I can get some other point of views we can come up with something cool together!
So: Who/what is Solkarn Senk? Why does he/she/it do what he/she/it does? Does he/she/it have an unknown agenda?
Come on people, lets get our brains together! 

