Katana
"Who the hell are you really?" Vinigo asked Luke, startled by the amount of information he seemed to know.
Even though the half-wolf was the Champion of the Tournament of Legends, it was somewhat hard to believe that he knew about the Demons being real, something that people usually only thought were tales and ignored. Therefore, when Luke proved to know the truth about this and more, Vinigo was afraid that he couldn't tell who this half-beast really was, nor where he had come from.
Upon hearing the questioning, Luke looked into the depth of the old man's eyes and declared:
"I am the one who will kill the First Servant."
Vinigo seemed even more surprised by that statement. Only a few people knew about the Servants in the Broteforge Empire, and those who did were either on the Cardinal Church side or the Smakusa Noble Family side.