[HoMM V]9 Race - Swamp! Is it needed?

and regarding curses, you could have... three types of curses, and one skill that extends their duration or something else...
but they can be removed with magic (

We read about the "Eternal Light" ability of the Dwarves. "Spells of Light Magic are twice as difficult to remove." That's why I suggested introducing "Eternal Night" for the Swamp faction.