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

Now, it seems we won't have Wintral, but we will have Desert Orcs. Is that right?

Added 18 minutes ago

If it's possible to change the list of summonable creatures, I suggest doing it this way:
Name: Shadow Summoning

Creatures: Shadow (a regular unit with a black texture and effects), Forgotten Ones (a creature from the dungeon with darkened textures and the ability to disappear), Faceless Ones (I think it's clear), Shadow Guard (a rider on a lizard without the lizard, with black textures and tentacles instead of legs, like the Faceless Ones)

Name: Demon Summoning :smile51:

Creatures: Cerberus (I think it's clear, but it needs to be made a 4-unit creature, for example, take the model from 6), Sadist from Might and Magic 6 (you can use the Minotaur model), Devil's Servant (repaint the witches in red, give them a fiery axe, make their eyes glow), Succubi (regular succubi, but completely burning)

Added 18 minutes ago
And artifacts like this instead of the Elemental Belt:

Shadows: Shadow Belt

Demons: Fire Belt