There are two mysteries surrounding Apostate that I am most interested in. Maybe the forum has some insight.
1) Group Affiliation: The Host
Ummm...what?
2) There are two proper names who are quoted in the flavor text of his deck. They sound demonic in nature, which is not surprising. But proper names? >G doesn't do proper names without some legit reason. Thoughts on them?
The host, all I can think of are the Stephanie Meyer’s book/movie and the act of communion.
As far as the names in his deck what are they, I lack a copy of infernal relics to call my own. Maybe they’re members of the host with apostate.
The names don't ring any bells, or google anything at all (Granuum and Nahropt)
The host I would assume refers to an angelic host, of which Apostate was once a member, and would now likely refer to a group of beings like himself who are interested in gaining power in the multiverse.
The Imp and Demon that have names are from a different realm, so I tend to think that Apostate left this realm of existance (maybe to avoid judgement) and has now returned, with allies.
I would not be surprised if the Host has more members coming, and a major role to play in the story.
But then I'm all about Apostate and Fanatic being big players in the story, so I see things that way.
Hahaha!
Just looking over the cards to find out what the proper names were and saw something I thought I recognised, had to do a search but my half-rememberings were right; The flavour text on the card Fallen Angel is actually lyrics from a song by Dio, the title of the track is Fallen Angels!
"Host" is another word for a group of beings or creatures, similar to "flock" or "swarm" or "throng", but one that's specifically often used with reference to angels, eg "The heavenly host" (or, to quote a song I love, "a host of holy horrors"). However, if Apostate is listed as currently rather than formerly affiliated with "The" Host, then that raises all sorts of interesting questions....
All the references to Grannum I can find are proper names, so it might just be a reference that the designers sneaked in. But I feel fairly confident that Nahropt is an anagram...possible translations are "Not Harp", "Hat Porn", "Port Han", "An Thorp", "North P.A.", or "Pat Horn". Pat Horn might be another proper name, and I of course like the idea of Hat Porn, but those are probably a bit of a stretch, while "An Thorp" isn't even gramatically correct (also rejected are those that involve non-actual words, such as Pot Harn or A Phornt). So probably the likeliest is "Not Harp", indicating that he was once a cherub in the Celestial Choir before Falling, and being renamed in dishonor of his lost instrument. Or perhaps it's just Nathrop, a contraction of Nathan Winthrop or Lathrop or something, and thus another reference to some friend of the >G guys.
In any event, I doubt that there's any real meaning to the use of proper names here...it's probably just them naming the characters, the way La Capitan's minions all have proper names in their flavor text (along with mechanically-meaningless type keywords). Grannum simply is the Demonic Pugilist and Nahropt is the Imp Pilferer, or more likely an Imp Pilferer since there are bunches of them.
(One quick rules question, by the way: based on the language of the Imp Pilferers, it looks like if there are two of them out, each one will destroy two hero cards? And three will collectively destroy a total of nine, at three specific junctures during the villain turn? Do I have this right?)
My goodness I saw a derby yesterday that I would die for. Hat Porn for the win.
As for the Pilferer, yes, they scale like Velociraptor packs, so one Pilferer destroys 1, two destroy 2+2, three destroy 3+3+3. Three Velociraptor packs is really wicked, had that happen once with Chariman playing Rook City is Mine, it was awesome.
Also if your argument supporting your ownership of a city is to let loose multiple packs of Velociraptors, well that is a pretty solid argument.
I'm with most people in that Granuum and Nahropt seem to be the proper names of the Pugilist and Pilferer respectively. Apostate is a summoner, so it would make sense he would need their proer names for the ritual and that he is pulling in specific beings.
As for The Host, I kept thinking it was a just the name they chose for the "legions of Hell" but I've got a second theory now. I read somewhere (maybe the rulebook bio?) that Apostate's goal is to open a portal between "Hell" and Earth. He is also called an Infernal Emissary. Seems to indicate that he is trying to bring forth greater powers into our world. The Host then being a group of beings who Apostate is trying to summon to this world. Could still be legions of hell, but then I wonder how did Apostate get out?
If he needs to open a portal to summon the others, and he can summon weaker agents freely, how did he get to this world? Maybe his original power was scattered into these artifacts he had to collect and that's why he draws health by destroying them if he is in trouble? But looking on the back of his cards I thought of something else.
It is a grey, granite relief. It shows two women, with three petaled things (flowers) above their heads. Between them is a flaming orb, possibly supposed to represent the globe. This is a jump, but where else so far have we seen stone carvings and mysterious, almost otherworldly, powers. What if Apostate was in Atlantis, what if Atlantis plays a deeper role in whatever Apostate is trying to useal and with his own powers?
No answers, but maybe more threads in the weave at least
Man Chaosmancer, that is my theory as well. I should look it up and link where I talked about it.
https://greaterthangames.com/comment/46011#comment-46011 Found it!
If that was the case, why not call the targets by their proper names if that is in fact who they are? Lt. Vyktor was not just called "Thorian Lieutenant" or something like that in Voss's deck ya know? To me, it points more towards thinking Granuum and Nahropt are important demons for Apostate, but maybe are not the Pugilist or Pilferer that we see. Theres a bunch of Pugilist's and Pilferer's in the deck, so are they all Granuum's and Nahropt's? I think theres more to them.
Vyktor is a singleton, while Demon Pugilist is not. A proper name would seem weirder in his case. My assumption is that Grannum is the first Pugilist who shows up in a game, and that if you play the other one, it's his buddy Stannite or whoever, who doesn't say much.
See also: La Capitan's crew, none of whom use their proper names as their card titles.
Saying Battleforged is not a proper name is like saying Legacy isn't a proper name. I guess I mean to use "proper name" to refer to a proper noun that happens to be a name.
Also Mable. I am being wrong on this forum rather a lot recently...
Its ok. Join the club! 
Hey, now - watch it there! Everyone knows that's my job around here.
(I think we all have our bad… evers.)
Oh, man, that's great! It perfectly mirror's Fanatic's Holy Nova, which functions almost exactly the same way as Fallen Angel, and has lyrics from Dio's Holy Diver in the flavor text.
Gaaaah!
I knew there were more but I was looking in the wrong deck, well spotted.
Oh, what's becoming of me.....
this is the stuff I made the Wiki for. 
You guys should help me add this stuff! (added this btw)