Originally Posted by Neverender
This worked for me, but it required a LOT more than 10 kills. I think I was somewhere in the 50's by the time it actually popped.
i dont see how it would take around 50 unless you did something wrong. the way i described is the correct method so all that crying about it being glitched is over. mad mac even found a certain way and level to get it. i send tailz a pm to change it on the achievement guide page but im pretty he or she is not worried about dark void anymore but this is the real deal ladies and gentlemen.