Harry raised an eyebrow. "Different faith," he said, but withdrew the silver amulet from his neck, raising it a bit and pushing some of his will through it.
The pentacle was a far older symbol, older than the New Age religions seemed to think. It was sometimes a religious symbol, true, but Harry ever regarded it as such. Harry Dresden wouldn't respect any religion that would have him as a member. He tried to remain as theologically invisible as possible. But the pentacle was also a symbol of magic; the elements bound within a circle of human will. And Harry had faith aplenty in magic.
The amulet began to glow immediately with a pale blue light, giving them illumination for the engine. It wouldn't do much else, but Harry didn't have the supernatural senses the vampire did. He couldn't see very well in the dark.
"Flashlights don't last very long around me, as you might imagine," he said, a smirk on his face.