Which race would you add to Heroes?

and what about hybrids, is it a good idea? And in general, all ideas should be implemented in Heroes of Might and Magic (and if someone doesn't need these factions, let them disable them in the settings). This way, there would be around 100 factions for variety. Or, it would be easier to create a faction editor (to create new ones), but in the fifth game, there are actually fewer factions than in the fourth (demons and undead can be considered as 2 in 1).