Expert Collector of River Goblin Thieves Expert Collector > Page: 4 Acquiring Req.: Collect at least 50 River Goblin Thieves. Reward: When collecting River Goblin Thieves, the Collectable Item is doubled. River Goblin Thief Lv 19 Legendary River Goblin Thief Hunter Natural Enemy (11-20) > Page: 5 Acquiring Req.: Kill at least 63 River Goblin Thieves. (River Goblin Thief's Natural Enemy Title is required.) Reward: Killing River Goblin Thieves grants you bonus XP. River Goblin Thief Lv 19 River Goblin Thief's Natural Enemy Natural Enemy (11-20) > Page: 5 Acquiring Req.: Kill at least 27 River Goblin Thieves. Reward: Killing River Goblin Thieves grants you bonus XP. River Goblin Thief Lv 19