There wasn't really any bloodlust involved. We did not intentionally go searching for awnies, rather stumbled upon them by following a quest, and they were usually minor ones. Perhaps if some of them threatened our designated area. Of course, there were transformations, I have to remind myself how we dealt with those.

Modifiers could be involved because of the bloodline strength of source/target, the circumstances (bloodlust, etc.) and the way bloodtheft is made.

The intentional bloodtheft by piercing and bloodlust for powers against blooded creature whose blood is much stronger than yours is a straight way to transfomation and should involve a gradual alignment transformation also.