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

well, what about this? For example, you start a battle, and you have a vampire. You click to attack an enemy creature, and instead of the vampire dealing damage, it starts playing heavy rock music! Instead of reducing the enemy unit's health, another stat increases, like "charm through music."
Then, the enemy's titan moves in to attack your vampire and starts dancing the "Moonwalk"! It could be a really fun mod if you think it through...