Hey Gothmog, I was working on the BFG:XR Chaos list and I had an idea for a Chaos ship that I think would fit well in the ASC. (It's a little too out there for the regular fleet doc, in any case

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Black Ark,
Voice of Hal........400 Points
Type/Hits: Battleship/12
Speed: 20cm
Turns: 45
Shields: 4
Armor: 5+
Turrets: 5
Armaments:
Dorsal Lance Battery: R60cm, S2, Left/Front/Right
Dorsal Torpedo Launcher: Sp30cm, S6, Left/Front/Right
Port Obliterator Array:
.........Gunnery: R60cm, S8, Left
.........Lances: R60cm, S2, Left
.........Turrets: +2 Turrets Value
Starboard Obliterator Array:
.........Gunnery: R60cm, S8, Right
.........Lances: R60cm, S2, Right
.........Turrets: +2 Turrets Value
Prow Obliterator Array
.........Gunnery: R60cm, S12, Front
.........Lances: R60cm, S3, Front
.........Nova Cannon: R30-150cm, S1, Front
Special Rules: The
Voice of Hal is ponderous and cannot use
Come to New Heading special orders. In addition, it is a unique vessel; only one may be included in your fleet. If taken in a campaign, it must be designated as your flagship.
Obliterator Arrays: The
Voice of Hal's weapon arrays have been slowly corrupted by the Obliterator Virus, fusing guns with their crews over the last ten thousand years, transforming the ship into a bizarre hybrid of flesh and technology. At the start of each of your shooting phases, you must choose which mode each of your Obliterator Arrays will use from the types listed in their profiles (each may use a different mode, if desired). An array cannot use the same mode it used on your previous turn (if any), unless the ship is on
Lock On special orders. The choice of mode lasts until the start of your next shooting phase. Lastly, due to the regenerative properties of the Obliterator Virus, damaged Obliterator Arrays are repaired on a roll of 4+ instead of 6 (all other systems must be repaired normally).
Spectral Shielding: The
Voice of Hal uses an advanced but unstable form of void shields stolen from the Martian Vaults of Forbidden Technology at the dawn of the Horus Heresy. Each time the vessel is hit (and its shields are up), roll a D6. On a result of 5+, the hit is absorbed completely - do not place a blast marker. On a result of 1, the shield belches forth a cloud of debris from previously absorbed hits - place two blast markers instead of one. Otherwise, the hit impacts the vessel's shields normally. When suffering multiple hits, resolve each hit one at at time until there are no more hits to resolve or the ship's shields run out (any remaining hits affect the ship's hull as normal).
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Anyway, that's it. Just a silly evil version of the Ark Mechanicus, since I was thinking there's no real representation of obliterators (one of my favorite Chaos units) in BFG. If you think the numbers need tweaking, have at it; this is just a sketch. Feel free to change whatever you want!
P.S. Also, would you be able to take the Heretic, Unbeliever, and Schismatic CLs from the BFGR Chaos book into the ASC? I'm cutting down the CL choices in the BFG:XR Chaos book (due to the voting from before BFGR went into limbo) but I don't think they deserve to be completely scrubbed.