"What kills malices is sharing knives. Sharing knives are... so, the people from my world who have magic are called Lakewalkers. We can do things to ground that most people can't. A sharing knife has to be made out of Lakewalker bone, and it has to have a Lakewalker's death in it, and then you stab the malice with the knife and the death goes into the malice and the malice dies too."