Okay. They can’t be killed by conventional means like a gun or a knife. You’re going to need something more…supernatural in nature. I’m assuming that you are human, so some of the weapons I used won’t be available to you. Instead, try looking into the occult, specifically protective and warding spells and rituals. If you can apply the right ward to a weapon, that should be able to kill them, or at least dispel them for a while. Hopefully that helps you. These things have been allowed to roam unchecked for too long. I wish you luck. You’ll need it.

I know of the creatures you’re talking about. I’ve preyed on them before. I’ve killed them before. They think that humans are easy prey. I’ve seen otherwise. Show them what your kind is capable of.