A Vampire's Mark refers to a territorial marking that is generated by Vampires onto their prey. Yue blinked her eyes in surprise, re reading the word 'Prey' twice to confirm that she read it right.
Marks of Possessions are personalized to each individual Vampire, acting as a claim of ownership over their prey and warning other Vampires not to trespass on what can be considered their territory. Marks of Possession are created intentionally by a Vampire during their feeding process in which during the ingestion of blood and injection of a Vampire's venom into their prey, a portion of their power is willingly given. Yue gulped, this didn't quite seem right to her.