Legolas smiled, which caused the Man to remind himself not to look directly at the Elf after a question that would provoke any movement of those rosy delectable lips, and answered, "A little of my blood. The beast attacked me before and bit my arm. I was lucky to be able to escape into a tree. I figured that since the warg had a taste of my blood, it would want more. And since I was already bleeding, I merely collected some to bait my trap. It was really all in theory, but I am glad it worked.