Expert Collector of Thief Assassins Expert Collector > Page: 5 Acquiring Req.: Collect at least 50 Thief Assassins. Reward: When collecting Thief Assassins, the Collectable Item is doubled. Thief Assassin Lv 28 Legendary Thief Assassin Hunter Natural Enemy (21-30) > Page: 4 Acquiring Req.: Kill at least 119 Thief Assassins. (Thief Assassin's Natural Enemy Title is required.) Reward: Killing Thief Assassins grants you bonus XP. Thief Assassin Lv 28 Thief Assassin's Natural Enemy Natural Enemy (21-30) > Page: 4 Acquiring Req.: Kill at least 51 Thief Assassins. Reward: Killing Thief Assassins grants you bonus XP. Thief Assassin Lv 28