Night of the Unicorn

Someone is killing Unicorns and the Magical Division of the FBI has been assigned to stop it. Special Agent in Charge Agatha Blackmore has an edge to solving this new case. Her familiar and friend Fergus is a talking Unicorn. But he doesn't want to help, even if it's his own Herd he's be saving. Sacrifices don't come back is all he will say. The team has to track down a killer while dodging Blood Magick and more Godly interference along the way. What is a Witch to do?