...As fate would have it, Xanthus was given the power of speech.
Xanthus is the immortal horse that Achilles rode into battle. Achilles had been warned by his mother Thetis, a goddess of the sea, that if he went to battle he would perish. Naturally, Achilles didn't listen to his Mother. As fate would have it, Xanthus was given the power of speech. Xanthus warned Achilles that he was about to die in the Trojan War. This time Achilles listened. So in a sense, Xanthus is the first true talking horse. Sometimes it takes a talking horse to get people to listen.