I've been out of the hobby for quite a while at this point but then I saw this video:
https://www.youtube.com/watch?v=1Mb_ZZffbAw
So hear me out,
Lord Discordant,
Riding a Heresy Train.
Take Duncan's basic conversion, add some tendrils, some spikes, some flames, have the Lord Discordant stood on the top holding onto some chains attached to the train, have the whole thing ramping off of some poor dreadnought.
Proper Doomrider vibes.
Thoughts? Suggestions?