"Oh, my dear Buffy. You do not have even the slightest inkling of exactly what I am capable of" Lucius chuckled darkly, taking hold of her wrist - too consumed by his lust for power and his craving for the darkness he was about to receive to be able to stop himself now.
Slowly and deliberately he ran the blade across her wrist, the cut was slightly deeper than necessary to draw blood but he wanted a steady flow. Healing a fractured bone was not cheap and he might as well recharge himself fully whilst he was there.
The moment the blade was pressed to Buffy's skin the dark power it had contained hit him, causing an almighty and carnal rush to envelop his being. Lucius had expected Buffy's blood to be more potent but this... the power felt orgasmic, like the rush he had gotten the first time he had done this. The day he had killed his mother.