“Heroes of Might and Magic V: Tribes of the East”

It's not just about having an elf hero; they need to carry a unit of their sworn enemies with them so they can switch at any moment (the city shows who their sworn enemy is, so they can retrain them at the last moment, and the enemy is out of luck).
By the way, can you retrain units in the Fortress on the hill?

Added after 8 minutes
What's also interesting is that there will be combined neutral units: you can combine griffons and angels.
I wonder if Nival will add outposts that don't disappear after a hero passes by.