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

Beams of light and light elementals are different creatures!
And dark elementals are planned for the Conflux, but not for the Necropolis.

By dark elementals, I mean void spirits. And in general, they don't really fit the Conflux... it's better to replace the magical elementals with genies (as planned). But for the 1st level, kabirs are perfect (for now, the Conflux castle seems too unremarkable in terms of its unit style and pales in comparison to the dark gnomes).