This Prophecy of the White Buffalo has been kept within our Magaska Ptesan Wicoti, Hinhan Wicasa Oyate for more than 160 years. Background My father was named Mato Gi, Brown Bear, by his Grandfather Tipi Sapa, Black Lodge after his elder brother, Mato Gi, who rode the Bay Horse, Eagle Claws, and slew the White Buffalo Bull, as prophesied.