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

Bad idea. There will be 2 lizards, 2 gnolls, and only 3 other swamp creatures... it's not very good.

I have an idea to make the caster some kind of human shaman/druid (like some mages found refuge among the lizards and gnolls).

The idea is questionable, but there should be a caster.

We could make the caster some kind of swamp spirit (it's nonsense, but... maybe it will work?)