Expert Collector of Ruin Knights Expert Collector > Page: 39 Acquiring Req.: Collect at least 50 Ruin Knights. Reward: When collecting Ruin Knights, the Collectable Item is doubled. Ruin Knight Lv 80 Legendary Ruin Knight Hunter Natural Enemy (71-80) > Page: 5 Acquiring Req.: Kill at least 665 Ruin Knights. (Ruin Knight's Natural Enemy Title is required.) Reward: Killing Ruin Knights grants you bonus XP. Ruin Knight Lv 80 Ruin Knight's Natural Enemy Natural Enemy (71-80) > Page: 5 Acquiring Req.: Kill at least 285 Ruin Knights. Reward: Killing Ruin Knights grants you bonus XP. Ruin Knight Lv 80