I warn you that I've used the Hellfire as an inspiration for the superbattleship, and at 800 points worth of stupid, it is really, really stupid.

It was aimed to be absolutely terrifying, and I think I nailed it:
The design is the same as the Hellfire, except using a superbattleship as a base.
Thus it has a broadside length of 4 weapon slots. It has 4 chaos batteries top and 4 bottom, of which 4 are straight WB and 4 are WB/Lance combos. Separating these two is a trench, housing a number of Imperial macro batteries, much like the Dauntless battery or one of the battlecruisers.
On the prow there is a large open mouth. Like the regular Chaos cruisers have teeth coming down, this will have teeth going up and coming down in a large mouth shape, between which will be a launch bay. Demonic facial features will be defined by torpedo launch bays, also prow.
Oversized batteries on the dorsal mount. Lance and WB. (Should only be one, I know, but super battleship.)
Stats:
Hits: 16
Shields: 5
Turrets: 5
Armour: 5+
Speed: 15-20
Prow: Torpedoes Str 6, Speed 30
Prow: Launch Bays, 6 Squadrons
Broadside: Macro Batteries Str 30, Range 30 (or less)
Broadside: Weapons Battery Str 20, Range 60
Broadside: Weapons Battery Str 10, Range 45
Broadside: Lance Battery Str 8, Range 45
Dorsal: Macro Cannons Str 12, Range 60
Dorsal: Lance Battery Str 4, Range 60
Calculated Point Value: 812
Estimated Point Value: 1000 - 2000
Special Rules:
Cumbersome - May not use CTNH or AAF
Hard to Miss - Incoming fire gains a left column shift
Priority Target - Unusual objects draw fire, no Leadership test needed to fire on this vessel
Oversized Battery - It's almost faster to turn the ship than the guns, Dorsal weapons may only fire in adjacent arcs on consecutive turns.
Powerful Reactor - Add 2d6 when calculating radius of explosion
Is this terrifying?