After being sure it existed but unable to find it for ages, I finally tracked down the short story about Typhon on Zaramund, "Exocytosis." I can't believe it isn't linked on either Typhus' or Zaramund's page in the lex but here we are.
Anyway this is the story about the point when Typhon comes to understand the warp presence that has been at the edges of his existence basically forever, and that's trying to stake a claim on him. It's the story where he accepts that and becomes actively invested in spreading it. And it's ALSO, i think now, the story that explains why Typhus on the tabletop can lead units of poxwalkers (disposable super low-power zombies) in addition to units of Terminator-armored plague marines (much more like him in power, movement, etc). The pilgrims who meet with him are people to him, sickly and strange but living and capable of communication, while to the Dark Angel who witnesses them, they're rotting corpses that somehow move. I wonder if that's a thing that continues, if he sees them that way while people without the Grandfather's grace can't see the life within death. (See also Dantine interacting with the Lords of Silence vs the horror the imperials of Sabatine have for him.) Fascinating to consider!
The story does NOT contain his first conscious and personal encounter with the Grandfather, which makes me pretty certain that it wasn't written out in the canon. And I think it'd be really neat to see.
Lots of good stuff in there though.
