The Hafgygar For Astonishing Swordsmen and Sorcerers of Hyperborea

"Till the monster stirred, that demon, that fiend/Grendel who haunted the moors, the wild/Marshes, and made his home in a hell./Not hell but hell on earth. He was spawned in that slime/Of Cain, murderous creatures banished/ By God, punished forever for the crime/ Of Abel's death."

The Hafgygar
Number Encountered :1d4 
Alignment : Chaotic Evil 
Size : L 
Movement : 40 
Dexterity :7 
Armor Class : 4 
Hit Dice : 15 
Damage : 6d6 
Saving Throw : 9 
Morale : 10 
Experience Points: 3,600 
Treasure Type : Q (X5 In Lair) 

The Hafgygar are amphibious man eating lake monsters found throughout the Hyperborean cosmos. They are secretive, dangerous, and very, very, cunning. They have a humanoid shape barely and are entirely cold blooded as some types of lake fish. These predators have thick insulated matted hair and jaws capable of opening to the width of a man.
Fire and light are enough to drive them away for a night over so but these things love human settlements to feast from. They are often times found nesting with family members and the female of the species are some of the most dangerous creatures within the Hyperborean planets. These mad bastard monsters are often coated with a slime making them hard to catch. Some individuals of the species have been known to have special abilities granted by physical mutation or as 'gifts' from some dangerous heathen gods.
 These monsters often take trophies from settlements that they take victims from. Often these things will murder the men folk of a village and then take mates for the next cycle of odious horrors to plague the landscape.
 There are both fresh and salt water varieties of these horrors. Often times there is warfare between Deep Ones and Hafgygar as they compete with each other for the same human food resources.