A mongrel sage isn't one species of sage animal. They are twelve hybrid animals created by Rikudou Sennin at the time of his death and hidden around the world, the entirety of which is considered the final sacred place. Their existence was not noted on the sennin's tablet or scrolls passed down to his kin. These types of sages exhibit territorial behaviors, rarely associating with one another, and even more rarely humans. Only two such sages have blessed humans with their knowledge: the were-saber tooth and the dragon-phoenix sages.