Strigoi

The Strigoi are mortal beings, transformed via The Rite in the same way as would typically produce Ulven, but by using tainted blood. They are sub-Ulven creatures, inferior in size, strength and intelligence. When a mortal transforms into one, they appear to lose all sense of who they were as a person and are unable to resume their human form. Strigoi, in the Ardeel language (Romanian) means ghost.

During their trip to Ardeel in VARULV Issues 7 - 9, Kjell and Stig  learned of the curse which befell Stig's lineage and others like him in recent generations. The bloodline had become unstable, and all of Conte Lazar's attempts at performing the Rite as normal on humans yielded only Strigoi. When Stig's blood was used to attempt the same on the Conte's fiancee, Diana, it yielded the same results. It can be assumed that the only way for the Chiropteran Ulven's blood line to continue would be through inheritance of the trait in children.