The Fomor are water-dwellers, cousins to the Jotun, seers, sorcerers, and shapechangers. They are humanoid, tall (~7 feet), and froglike, with pale skin and bulging eyes. The Fomor are capable of using magic, and unlike most, are not impeded by running water like mortal wizards. They have specialised weapons that shoot out acid filled spines adapted and used in different ways similar to grenades, guns, and mines (enchanted seashells serving as firebombs, for instance). They are supernaturally strong, resilient, and can communicate and echo-locate similar to dolphins and bats.
The Fomor have in recent years been making a play to be major magical powers, kidnapping mortals to transform into minions and taking over coastal territory. They have been known to make use of The Fog from time to time to mask attacks as well as their comings and goings.