RTF is a global modification that replaces all towns in the game.

I have another idea.

Since we've almost finished the Winter Guard, why not allow players to place their castle on the map using the map editor? And also create a spell called "Summon Ice Demons." It randomly summons any creature from the faction. Cost: 50 mana.

As far as I know, you can summon one of four creatures, and the creature depends on the territory you're fighting in. There's also the Phoenix summon, making it a total of five creatures. And two more can guard banks and be recruited in the tower on the map.