There is the Saranites who lives in the Green Plains, riding tigers.
They are called Beast Riders as they ride beast. They have the abilities to talk to beast, understanding their language.
The Ragran is a community type of tribe. They look out for each other and live near the sea; they could swim and dive for a long time, breathing underwater like a fish.
The Negevians lives near the Black Hills, called the hill folk by most of the other tribes. Their abilities are a secret even among the Thirteen Tribes and they are very mysterious.
Eradites lives inside the Illusion forest. Considering their abilities in magic, especially illusion magic, it is not bizarre at all for them to live near the forest.
Every Eradites is born with great reserve of mana in their bodies and they all are expert in illusion magic, making them as formidable as faerie.