A trial spell.

John flicked through the pages of the book and stopped at a page entitled "Phantasmal Phallus" in ornate script at the top; beneath the heading an illustration depicted an eerie glowing penis. John read the spell's description to himself, stumbling over words written in archaic English and Latin.

"Well," he said after a couple of minutes, "if I understand this correctly, this conjures an invisible cock which will fuck whomever you target the spell at."

"Yeah, right!" Sandy laughed. "Come on then, read it out and disappoint yourself. Just don't be looking at me when you read it."

Sandy looked about and saw a librarian sitting behind a counter some distance away. The librarian looked about 25 and was thin with shoulder length brown hair and thick glasses. Sandy pointed her out to John with a wicked grin.

"There's a nice little guinea pig for you." She said. "But don't be too upset when nothing happens."

"OK, here goes." John said and cleared his throat before intoning solemnly. "PHANTASMO PHALLUS COPULATO."

With an elaborate flourish he pointed at the librarian. For a few seconds, nothing happened, and Sandy giggled at John, opening her mouth to say something, when a loud squeal from the librarian grabbed both of their attention. The young woman had shot bolt upright in her chair and was gripping the counter top with both hands with a shocked expression on her face. Sandy looked back to John dumbfounded.

"That's got to be a coincidence." Sandy said, shaking her head in disbelief.

"You reckon?" replied John.

They looked back at the librarian, whose brightly flushed face was obvious even at this distance. The woman was squirming in her chair and her stifled moans were clearly audible across the library. Despite his shock at the spell actually working, John felt a thrill of power and felt his cock stiffen as he watched the librarian. The woman was panting hard now, her body rocking back and forth as the invisible **** fucked her.

"Stop it, John," Sandy urged looking worried.

John read through the spell again looking for a way to dismiss the spell.

"I don't think I can," he whispered. "I think it only dispels when..."

"OH FUCK, YESSSSS!" The librarian's orgasmic scream rendered John's unfinished sentence moot. With her hair disheveled and gasping for breath, the librarian slumped in her chair with a beatific smile of bliss.

"Oh wow," Sandy exclaimed. "This is so unreal. We've got to check this book out."