Expert Collector of Vampire Knights Expert Collector > Page: 16 Acquiring Req.: Collect at least 50 Vampire Knights. Reward: When collecting Vampire Knights, the Collectable Item is doubled. Vampire Knight Lv 51 Legendary Vampire Knight Hunter Natural Enemy (51-60) > Page: 1 Acquiring Req.: Kill at least 427 Vampire Knights. (Vampire Knight's Natural Enemy Title is required.) Reward: Killing Vampire Knights grants you bonus XP. Vampire Knight Lv 51 Vampire Knight's Natural Enemy Natural Enemy (51-60) > Page: 1 Acquiring Req.: Kill at least 183 Vampire Knights. Reward: Killing Vampire Knights grants you bonus XP. Vampire Knight Lv 51