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

Thank you for your help; I'm a beginner when it comes to modding, so there are some mistakes. Everything I found on this topic was Sashager's video on replacing a unit and its stats.

The only mistake I found was with the Ifrit faction – you added upgrades and characteristics, but you didn't define the faction itself. There was also a complete mess in the mod initially; I cleared up this nightmare a long time ago to be able to properly modify elementals, and then I switched to RTF and deleted it because it was no longer needed... or it became the basis for RTF; I don't remember anymore.