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Nick, I think everything makes sense... In Heroes 5, the upgrade system works like in Disciples, so it's all good.
Okay... Oh, I don't like giving criticism... But I have to, I apologize. The idea for the faction itself is very good, but the creatures are a bit lacking (IMHO). Angels already exist in Heroes, but I understand that these are different. In principle, I would like more fantastic and original creatures, but since my imagination isn't working, I won't argue actively and will remain silent... So, I'm just expressing my wishes.
TibVar - the idea is good, it's much better for users and moderators to discuss factions here, and then the most interesting ones can be moved to separate topics... well, again, IMHO. No need to get upset.