Thanks, @SheaHublin. Puts me up to 25 potential Executor-class Super Star Destroyers across Legends and Canon, out of an anticipated 26 in One Canon (minimum) so that's nifty. Executor I, II, Annihilator I, II, Enforcer, Vengeance, Terror I, II, Avarice, Whelm, Aggressor, Reaper, Guardian, Brawl/Iron Fist, Razor's Kiss, Intimidator, Arbitrator, Eclipse, Ravager, EX-F, Oppressor, Conqueror, Empire, Gladiator, Intruder. Enforcer is from S-Canon. I named X1's SSD the Avarice after his first command, lost at Hoth. Similarly without much to work off, Terror II seemed appropriate for a second cloaked SSD variant. The EX-F because there were three Super Star Destroyers in the Black Fleet, it's described as on a Dreadnought-keel, and we can name the other two SSDs, it just fits. Executor-class F variant. I do wonder if Night Hammer was constructed earlier than when Delvardus finished it. Perhaps his escape ship from Eriadu, albeit incomplete. Otherwise he put together a Super Star Destroyer with minimal resources in two-three years top, or the stealth armour took that long. But if so, that's 26 total. (I say 26 because Kuat constructed 13 according to Aftermath II in Canon, so may as well multiply by two to include Fondor. That's the minimum, in my eyes.)
You mean like say, the unnamed one at Fondor in Rogue Squadron III? As for the Stealth Armor, I assume the intent is that it's the same black plating used for the Eclipses(notably said to be mistaken for ghost ships), so he probably didn't make it himself so much as raid deep core facilities for materials. (I also assume it's the stygian tri-prismatic polymere used in the Singularity and Shadow troopers which presumably had Meltmassif as a component, which would further allow Palpatine to continue using the life force harvested at Byss across light-years and fit the implications of the Eclipse being a mobile Darkside temple).
Yes, the unnamed one at Fondor, @Carib Diss. The Terror II, indeed. I assumed so for the Night Hammer too... I also absently wondered if it was incomplete as it fled Fondor when it seceded from the Empire. Fondor is on the Rimma Trade Route, after all, which Delvardus largely controlled up to Yag'Dhul immediately after Endor. With Fondor seceding, Mrlsst and Corellian rebellions, the crew of the Night Hammer may have simply detached from the space dock and rushed rimward.
I always thought Razor's Kiss was a terrible name for a Super Star Destroyer/Dreadnought. (I know. But I just had to get it off my chest.)