Item description:

Vampire Slayer:
Kill Vamp. (He's annoying)
Avoid Vamp close up, he does a hard to dodge attack. Long range he throws knives easy to dodge.
Use the M4 until Vamps health is half gone. You can only shoot him when he's not glowing red.
After half his health is gone, put down claymores. He'll walk right into them.
Once he has only a small amount of health left, he'll keep flipping from place to place throwing knives.
He only flips between 6 places. Pick one and wait till he's there and not red. Finish him off with M4.