Higher vampires also favor striking while invisible, appearing only when they are an eyeblink away from sinking their claws into a victim. This makes yrden absolutely vital both for revealing the vampire, and also keeping it in place long enough to cut it down with a silver sword, ideally coated in vampire oil. Igni is one of the few real weaknesses a higher vampire possesses. Use it if you can; if it catches on fire, it will be stunned for a brief moment.