In the main storyline, the player meets a NPC named Nvwoti, who requests for Natan to go out and find UMas for him. UMAs can be captured by using bait and then defeating them in battle, but it also requires some hunting and survival instinct. UMAs become unloked as you progress throughout the game. When you reach an area where an UMA is found, return to the Grand Canyon and speak with Nvwoti, who will give you information on the next target.