Need help with a current campaign
I have been slamming my head into a brick wall trying to come up with something that will tie seemingly unrelated plot threads together in the campaign I am DMing, and I would love some help. (Azi, Farlos, Drek, and Drak, STOP READING!)
To set the stage: I have four players, all at level 2, and this is more of a mystery and political intrigue type story. There has been one combat out of about 5 sessions, and it was quite small. To make a long story short, one player is involved in the Selesnya Conclave and just got a new boss whom they suspect to be a vampire (spoiler, they are), another player was recently fired from the Izzet League and has taken up new employment working with a scientist trying to crack time travel, and a third player is a Boros Soldier that is actually a Dimir sleeper agent, though they don't know that yet.
I am trying to connect these three threads to each other. What I have so far is that Lazav, the Dimir guildmaster, is the one funding the scientist's time travel research with money from the Orzhov Church, the scientist ended up figuring it out and traveled forward in time bringing the vampire back with him, but I don't know how this vampire can connect to the Dimir. It's a little lame to just say "They're working for Lazav", I want there to be some sort of Orzhov Church connection. So basically my question is twofold: Why would a vampire from the Orzhov Church be undercover in the Selesnya Conclave; and why would the Orzhov Church and the Dimir be teaming up to discover the secrets of time travel? Bonus question: why would they send this vampire back in time to infiltrate the Selesnya Conclave?
I've been stuck for a week trying to figure out something interesting. I backed myself into a corner by not having an ending in mind and pieced the plot together as my players explored the clues that I had given them, but now I am stuck. Any ideas would be greatly appreciated.