Do not look at it; remember that it is helpless. He takes the Duvel bottle that is standing on the right side of the bar. He throws it at a random person and it kills the barman. With regrets you leave the bar and go down the street for cure, but it takes months for the witch to fully understand your demand. Then if she considers your request worthy of it, she'll send her army of old greek writers. They fight problems using philosophical weapons. They could be a threat for your people.