So, I'm waiting for suggestions and very harsh criticism :)

Here you go :)

A special ability, or rather, not quite an ability: a new resource is introduced - energy. It can be earned in battle, or rather - through experience. What is a battle? It's about killing. After a kill, the soul flies away, and the spirit dissipates. The spirit is energy, and we will absorb it. In general, the amount of energy is equal to the amount of experience gained. And only with energy can you buy the creatures of the castle. Buildings are constructed with gold.

This ability would be even better suited for necromancers; it's not clear why the undead need gold at all. By the way, it's also not clear to me why angels need money:confused:
But since even they are bought with money, your race of order should also be bought with money. By the way, if it turns out as you say, then only the heroes of this castle could buy units in this castle... And this would create a significant imbalance in the game.

Further. Regarding the warriors themselves - it's somehow very narrow... like creating an entire race of swordsmen - a swordsman without armor, a swordsman with a shield, a swordsman who throws swords, etc.

By the way, it's not clear how a centaur ended up here:confused: In general, it would be great if you tied this idea to a race of creatures that actually exist in some mythological system. Then it would be great. But as it is, this is YOUR idea, and although it is original and interesting, it has no basis. For example, dwarves are not the developers' idea, although their interpretation differs significantly from the mythological one; dark elves, for example, are worse, because this is Salvatore's idea (in Tolkien, dark elves were villains, but still elves, who had never been in the Far West); some kind of mages are in a difficult position, because on the one hand, there is no such mythological race, and on the other hand, there are different fairy tales in which wizards participate, so there is a basis.
And in general, every race says something to the player - for example, I perceived dwarves as old acquaintances, dark elves too; but your race doesn't say anything to anyone and - unfortunately, because the idea itself is good - it can't say anything