How many factions are there?

You can add them to the Storm units. They are warriors who transform into something when their numbers dwindle, or something like that. Although, it would be better to add them to the higher-tier units, if there were any. It's okay, we took into account that you added Medusas and Troglodytes to the swamp. And only the creatures.

Well, Storm units are already high-tier, I just modified them a bit, specifically for the game, and to give them a special ability related to storms and lightning. Thanks for pointing out the shapeshifters. Great idea. I'll give them level 6. I'll call it Elf-Shapeshifter. It has magic and can transform into a Wolf, or it can transform into any attacking enemy creature, taking into account its health. Basically, one of those two options.