Certainty sent a sick dread snaking through his gut: he was being stalked. - Stephen R. Lawhead

The spell is Morgians

I knew, even as we touched that I had never wanted anything more in all my life. All my crabbed cravings were as a cupful of pond water beside the vast ocean of longing I felt surging through me. My head swam; my eyes blurred. I burned from the inside out as if my blood and bones were consumed with liquid fire.

I could not see the unholy creature, but I could feel the bone-aching chill of its presence, and I heard the howl of its mindless hate. I quailed to think of the power that had called it into being and loosed it on the world.