Variant Vampire.

The reluctance of the fledglings to attack other Vampires will obviously change if they can also feed on Vampires too. They wouldn't care where the blood comes from. They will kill anything as long as it moves. They will become predators to both the Vampires and the living. 

He said in understanding, "So his Lineage became a plague and a curse on other Vampires. He as the source of that plague was despised."

"Exactly," The vampire said in agreement. "He is also ugly which is another great crime so was very despised."

Ragnarok thought to himself, "It is something that has never happened before amongst vampires. Then again, no Warrog has ever become a vampire. So Xigger was that special. I know now why the demon god wants to recruit the fountain of life so badly."