" This is it?” I asked. “This is going to keep away an uber-powerful dream entity? It looks like a prop from The Blair Witch Project.”

“It can’t force her away,” he said. “Nothing can. But it might make her think twice. It’s more of...a repellent.”

“Like citronella?”

He rolled his eyes. “Yes, like citronella. "

― Richelle Mead , Succubus Dreams (Georgina Kincaid, #3)