The unicorn can be found north of Diez Coronas and west of Torquemada (there are three horses painted there on the map). If it does not appear, fast travel to Cochinay, then fast travel back to Torquemada, and it should spawn. If it still does not spawn, successfully complete all challenges, and then try again. Note: The chupacabra must first be killed before the unicorn will appear.
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