Fury Bone King's Natural Enemy Natural Enemy (31-40) > Page: 23 Acquiring Req.: Kill at least 90 Fury Bone Kings. Reward: Killing Fury Bone Kings grants you bonus XP. Fury Bone King Lv 31 Legendary Fury Bone King Hunter Natural Enemy (31-40) > Page: 23 Acquiring Req.: Kill at least 210 Fury Bone Kings. (Fury Bone King's Natural Enemy Title is required.) Reward: Killing Fury Bone Kings grants you bonus XP. Fury Bone King Lv 31