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

Not at all!!!
Initially, there was emptiness and primordial magic.
Primordial magic, in the form of an egg, gave birth to two twins - Ash and Urgash. Then, Ash gave primordial magic six forms (without using the magic of emptiness). Emptiness is, in a way, the opposite (counterbalance) of primordial magic.