Suggest new ideas here.

What do you think about introducing a "Guardian of the Capital"? The guardian could be summoned only once per game, and only in the capital city (with a capitol building), in a fully developed city, and with an Ash Altar built inside. This would serve as a unique bonus for a fully developed city, in the form of a single creature, the most powerful for that race. We could come up with something like supreme giants or ancient archmages, but I suggest summoning the gods themselves – Silanna, Malassa, and so on. The spirits of the gods would be immune to abilities like Blade of the Sky and Fingers of Death, possess a set of spells, and have a very large amount of HP (possibly over 2000). However, there would also be drawbacks: the spells would only be defensive, albeit massive, the creature would have no speed at all, and would be immune to teleportation – this would be purely for defending the hero's main castle. If the spirit is destroyed, a new one cannot be summoned, and the spirit will leave on its own if it is not offered weekly sacrifices, such as blood for Malassa or resources, for example, for Silanna. For some reason, this idea came to me. I don't think it would significantly affect the balance, but it would make taking the main enemy fortresses much more interesting and challenging. =)