Van Helsing Season 5, Episode 13, "Novissima Solis."**
Welp, Bathory (Jesse Stanley) is dead, having thrown herself off the ledge of a tall building to prevent the Dark One from being able to use her as a pawn anymore. This seriously endangers our heroes' plan to have her read from the ancient scrolls to stun Dracula while they can finish her off.
However, there might be a saving grace to all this: Vanessa (Kelly Overton) finds the Dark One's pentagram insignia on the back of Bathory's neck, and by carving it out and grafting it onto her own arm, she can use it to tap into Dracula's mind. Neat trick.