Okay, I will edit this later ... but basically I have a pretty good idea to share for a good civ, methinks
theme is fascist crusading demons/dragons (good alignment)
Nation: DremonSkythe
Leader: Verdoon -aggresive, fanatical, orgainized, oppresive, paranoid?, genocidal (against evil demons, tries to cleanse the followers of evil, tho usually they fail the process and die as well)
For reference I'd say aggresive/ organized, favorite civic domination
basically they are demons that see demons as being absolutely evil without hope for repentance, so they are demons (or dragon/half dragons) that believe the only way to combat the presence of evil is to attack all signs of evil with even greater evil ... in order to oppress malice and leave the world to those humans that would uphold greater virtues.
I can think of a tangent race to demons that grew either very self-hating or became enlightened, and had to kill off most of their race, to leave only those that follow their strict ideals to the exacting letter. (kinda thinking of Bannor meets Sheiam with a fanatical obsession with killing demons and repressing their followers in order to maintain their purity) gaining many followers of the "path of cleansing" ... dissillusioned, weakend humans, as well as fanatical humans, and perhaps anyone directly wounded by demons in the past, and survive with a free will to tell the tale, will join their ranks.
and then their offspring are cattleherded into the nation with the dictatorial control by the draconic "ministry of cleansing"
Important tho ... is that they still accept converts from Humans that absolutely hate demons, and even demonic converts ... although the testing process for demons has a high risk that prospective demon will lose their soul unless they are completely filled with a desire to destroy all demons from the world. Im thinking that the demons brainwash eachother into using the cyanide tablets/ explosive runes in their teeth or brains .. if they are about to fall into the ways of folly.
therefore (perhaps make their race half-dragon? or neoDemon? make all units with the actual demonic nature be immune to capture ... or even all their units immune to capture)
I think the palace, if similar to ffh mechanics to have -20 war weariness, fire earth and law mana.
unique buidings would be like the
Pit of Banishment with -20%maintanence -20% ww and +1 unhappyness.
Interrogation Cell/ Torture Chamber +1(or2) unhappy, grants loyalty and demonslaying promo to units built in city.
Purge the Unclean (possible namechange?) Perhaps a repeatable ritual that lowers all cities population by 1 and removes any neutral or evil religion ... unless there is one super good religion, in which it removes all religions but that religion, and its weight for that religion is an automatic adoption.
Although I am also thinking of them being agnostic.
Im thinking high end melee and recon units could be half-dragon.
Ravennor Exhalt: Hero could be a Librarian style Inquisitor (half dragon of course) weilding a scythe called a "soul sever" which eats evil souls and sends other souls directly to the good gods (somehow?)
I think he should be able to see invisible and get a considerable bonus against demons and undead.
Race would mostly consist of human followers, but a very openly fierce and strict oligarchy of dragons. (im thinking an offshoot of demons to be called dragons, tho more half/dragon really)
These zealos despots would control the most nefarious demon magiks and torture devices in order to eradicate evil from the world.
Michai'el the Cleansed -Im thinking a secondary hero could be a human follower, so dedicated to his dragon lords that he is completely protected from the daemonic evils. Perhaps he has the "cleansed" promotion which makes him magic immune to all evil magic. Im thinking of lesser demons automatically dying around him ... wether through a spell, mechanic, or an extreme bonus vs lesser demons. Greater Banishment perhaps a spell that causes 70% damage, can be lethal, surroudning like ring of flames, only affects demon race, hopefully only below level 4 or 5, and sends them directly to their capital.
perhaps make him slow to gain exp, weaker in some other way, and very vulnerable to humans or neutrals.
I dont expect any of these demons, except maybe one unit, to have 4 legs, the dragons I was thinking are more like humans or demons, only dragon head n claws, and wings. which is a racial trait for the particular minor race of daemonic kin which decided to instead genocide all other demons- and ultimately eradicate evil "and themselves" (maybe)