Fallen

P. S. In general, I'm upset that we can't come to an agreement regarding the cities. Maybe you just don't like the fact that there are so many of them?

In general, there really are a lot of them. With a zero team composition, you won't be able to implement so many factions. Ideally, you need to choose two original factions. Although I'm not against thinking about the concept of the remaining factions. Okay, this is already off-topic.

P .P. S. although for the city of the Fallen in the 5th installment, heretics and vampires really don't fit.

Yes, the city is for the 5th installment. You can come up with a separate version for the 3rd installment.

I was somehow reminded of ghostly creatures, incorporeal spirits.
The very ones that repelled Gondor in the third part of The Lord of the Rings.
These are rebellious souls that are held on this earth by an unfulfilled obligation.

You can't cause physical harm to them (only with magic or an artifact), they are alien to Fear and other arguments of Reason. Almost all applied weakening and strengthening spells turn out to be useless. They cannot use magic (all hope is on the heroes).

But they fight very well themselves. There will be a place here for both people and more powerful creatures like trolls; knights (cavalry) must definitely be present - of course, all dead. Someone else (maybe the soul of a wizard?) should have the ability to hold the souls of certain types of killed enemies. As in the case of the Necromancers, they join after the battle, but not in a percentage, but as many as they could hold.

I'm glad you joined :) In fact, the Fallen and Oathbreakers are not the same thing. I didn't want to make the Fallen dead - second necromancers. Therefore, the word "Fallen" expresses not those who fell in death, but rather those who fell from heaven upon the enemy - supernatural beings, but not paranormal. They did not die; they were created by the Dragon of Order from pure energy. Well, this is my initial version :] Disadvantages: it's quite difficult to come up with units. Units:

Spirit of Order - pure energy, pure spirit.

Living Armor - stronger spirits that use not energy, but iron for attack, which is more effective.

Centaur - a mythological creature from the 3rd installment, created by the Dragon of Order. All white, orderly, and material.

Acolyte - a fanatic. An attracted person who gradually rises and partially gets rid of his material body.

Well, and a magical elemental - a component metaphysical energy :) It doesn't work, that's clear.

In fact, 3 creatures (excluding the magical elemental and centaur) already exist. You can try to add some series of mythological creatures that correspond to the castle. But nothing comes to mind, and that's the disadvantage - a certain lack of identity. You can, in principle, make the creatures completely unusual, of all colors and densities, without following any mythology. Or you can completely recreate creatures from scratch.

As for the concept of the Oathbreakers. Disadvantages:

- They are dead, like the necromancers.

- A direct plagiarism from The Lord of the Rings. Thousands of fans of the trilogy will recognize them. Not exactly a disadvantage, but...

- again, they will have death magic. It's not original.

- And it will just be not a very original race: there are riders, there are warriors with weapons. The only difference is that they are dead and transparent. The race will be homogeneous.

- Balance. "Leakage" will be annoying. Too strong units are not allowed.

In general, that's the situation. Personally, I think I've found a style - it will be semi-demonic (red glows) and semi-light - blue glows. But the demonic is not so obvious; blue will be the predominant color.