Expert Collector of Yellow Worms Expert Collector > Page: 8 Acquiring Req.: Collect at least 50 Yellow Worms. Reward: When collecting Yellow Worms, the Collectable Item is doubled. Yellow Worm Lv 2 Legendary Yellow Worm Hunter Natural Enemy (1-10) > Page: 1 Acquiring Req.: Kill at least 14 Yellow Worms. (Yellow Worm's Natural Enemy Title is required.) Reward: Killing Yellow Worms grants you bonus XP. Yellow Worm Lv 2 Yellow Worm's Natural Enemy Natural Enemy (1-10) > Page: 1 Acquiring Req.: Kill at least 6 Yellow Worms. Reward: Killing Yellow Worms grants you bonus XP. Yellow Worm Lv 2