Legaia Densetsu

The history takes place in the eponymous world, humans use objects called Seru. They unite and use fantastic powers. While they had once peacefully existed, the mist appears and upsets the Seru, which transforms some humans into monsters. Ten years later, human survivors band together to stop the mist, using entities known as Ra-Seru, which are immune to the Mist.

(Source: Wikipedia)