Nereids are dangerous sirens of the sea nymphs that slithered their way into the Caernarvon long time ago. They lived guarding their territory well but were always threatened by men and beasts. Long after nereids were hunted, they grew fiercer and fiercer each day. After centuries of being hunted, they resorted their pain in summoning Pherusa, the Goddess of the Nereids. Dark and sinister, she was an evocation of all evil and pain. Her feeble nereid sisters used all sorts of magic and materials to bring her to life including one very special metal, Viridian. Believed to have strengthen her, Pherusa has slithered her way into the Arena Battleground hiding in the depths of the land waiting for an opportunity to strike.
When war takes place at the Arena Battleground between Humans and Akkans, Pherusa will lurk in the corners of the land. With the possession of Viridian along her side, she will await for both the races to come to her and get her revenge for her sisters. Little that she knows, the Kartefants and Merkhadians will go to any lengths to obtain the precious Viridian. Pherusa will also time her appearance so Humans and Akkans will have to time their attack as well without getting killed by each other.