Hygric said:
I like the ideas in this thread. I can see it being usefull for a mini-campaign to introduce a Grey Knight PC into the group (I have a player in my group that would litteraly give his left nut to play a GK).
Firstly, have a OX Inquisitor send the squad on a mission to retrieve an alien artifact from cold-traders on an imperial world. Unknown to the party at the time, this Inq is rather radical and intends to use the Halo Device that the party just retrieved on himself.
Secondly, party gets a mission from same Inq to go kill off the priesthood of a nasty little warp worshiping xeno race. Que the mind-wipe scenario for the final battle.
Campaign continues as normal for a bit, with a few more subtle clues being thrown in now and then both to the presence of the GK and a few subtle hints that the Inq isn't the same man any more.
Finally, the Inq sends the PC's on a mission to wipe out a Xenos race that is almost extinct. These Xenos are the ones with an alliance with the GK. Que some great RP'ing opportunities between the two factions. Provide clues that the Inq is corrupt as hell now and have a single GK volunteer to come back to Erioch with the KT to deal with the rogue Inq who is now a threat to both the OM and the OX.
After the dust settles, much explaining is done by the PC's to the watch commander and other important people on Erioch, resulting in a pact between the GK and the DW to protect and keep hidden the Xenos resource, at the cost of that single GK being assigned to the DW.
Very rough draft, just hashing out an idea. I know that according to fluff a GK would never be in the DW, but it would be a plausible suspension of disbelief for my group to get a GK into the party this way. Heck, maybe even make the GK become a blackshield with his secret kept safe by his Brothers in the new squad. Renouncing ties to the GK this way might sattisfy the powers that be that there are no GK's serving in the DW. :-)
I think I would go a different route: make the Ordo Xenos Inquisitor a puritan instead of a radical, and the xenos a genuine threat for the Imperium, pheraps their destruction would save worlds or even a whole sector; these things are Xenos Horrificus (the Inquisitorial designation for the most evil and dangerous xenos), yet they also hate Chaos and have an arrangement to help Grey Knight fight daemons. What's the lesser evil: denying the Grey Knights some of their most effective daemon slaying tools, or allowing one of the most evil and repulsive xeno races to live and kill billions? Either way, no one really wins...Grimdark!