Nosferatu is a unique boss that requires precise aiming. His weak point is the exposed heart on his back. Use the Sniper Rifle (if you have it) for critical hits. If not, the Handgun or M93R Handgun can work, but you'll need more shots. Keep your distance and circle around him to get a clear shot at his back. He has a poisonous gas attack, so be ready with a Blue Herb or a mixed healing item. This fight is about patience and accuracy.
