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

well, what about this? See, for example, you click on a battle, and you have a vampire; you click to attack an enemy creature, and the vampire approaches and starts playing heavy rock music. Instead of reducing the enemy unit's health points, for example, another stat increases, such as "fascination with music."
Then, it's the enemy's turn, and their titan approaches to attack your vampire and starts dancing the "Moonwalk" by Michael Jackson. It could be a fun mod if you think it through...