Expert Collector of Gritstorm Rex Crushers Expert Collector > Page: 41 Acquiring Req.: Collect at least 50 Gritstorm Rex Crushers. Reward: When collecting Gritstorm Rex Crushers, the Collectable Item is doubled. Gritstorm Rex Crusher Lv 58 Gritstorm Rex Crusher's Natural Enemy Natural Enemy (51-60) > Page: 10 Acquiring Req.: Kill at least 183 Gritstorm Rex Crushers. Reward: Killing Gritstorm Rex Crushers grants you bonus XP. Gritstorm Rex Crusher Lv 58 Legendary Gritstorm Rex Crusher Hunter Natural Enemy (51-60) > Page: 10 Acquiring Req.: Kill at least 427 Gritstorm Rex Crushers. (Gritstorm Rex Crusher's Natural Enemy Title is required.) Reward: Killing Gritstorm Rex Crushers grants you bonus XP. Gritstorm Rex Crusher Lv 58