Tales of Tolgard
Xeg-ya are creatures from the Plane of Positive Energy. They are summoned by spellcasters and used as guardians of magical treasures.
They appear as 5-foot diameter spheres with six 5-foot long tendrils protruding around its body. They have bright golden eyes set in the center of their bodies.
The xeg-ya attacks using its tendrils to touch an opponent or fire a blast of energy at a foe. They deal fire damage, destroy combustibles, and affect metal like the heat metal spell. Some affected metal will crumble to dust. When slain they explode in a ball of positive energy. Finally, if they ever come in contact with their opposite, the xeg-yi, both creatures will rush together and explode in a frozen ball of fire.