Alright, lets talk about the karkadann, or the “Lord of the Desert”
An early description of the karkadann comes from the 10th century Persian scholar Abū Rayḥān al-Bīrūnī (Al-Biruni, 973-1048). He describes an animal which has “the build of a buffalo…a black, scaly skin; a dewlap hanging down under the skin. It has three yellow hooves on each foot…The tail is not long. The eyes lie low, farther down the cheek than is the case with all other animals. On the top of the nose there is a single horn which is bent upwards.” A fragment of Al-Biruni preserved in the work of another author adds a few more characteristics: “the horn is conical, bent back towards the head, and longer than a span…the animal’s ears protrude on both sides like those of a donkey, and…its upper lip forms into a finger-shape, like the protrusion on the end of an elephant’s trunk.” These two descriptions leave no doubt that the Indian Rhinoceros is the basis for the animal. But the future confusion between the rhinoceros and the unicorn was already in the making since the Persian language uses the same word, karkadann, for the mythological animal as it does for the rhinoceros, and this confusion is evident also in the illustrations of the creature.
The Persian physician Zakariya al-Qazwini (Al-Qazwini, d. 1283) is one of the writers who at the end of the thirteenth century links the karkadann’s horn with poison, in his ʿAjā’ib al-makhlūqāt wa gharā’ib al-mawjūdāt. He lists a few beneficial effects: holding the horn opens up the bowels to relieve constipation, and it can cure epilepsy and lameness.
In the 14th century Berber Sunni Islamic Scholar Abu Abdullah Muhammad Ibn Battuta documented describes it as a ferocious beast, driving away from its territory animals as big as the elephant; this is the legend that is told in One Thousand and One Nights, in the “Second Voyage of Sinbad the Sailor”.
Another description said to be the size of a bull with a somewhat wolf like appearance and process two horns which protruded from atop its skull. The first horn, said to resemble an ivory spike, stuck straight up from the creature’s cranium and was said to be used as a means of gouging the Karkadann’s victims. The second horn jutted out from just above the animal’s nose and was said to be curved and bone like, this horn was reportedly used only as a means of self defense. This description is very different than its original depiction.
Information from: http://cryptidz.wikia.com/wiki/Karkadann
The picture is probably from some old manuscript, but the source could not be found despite my efforts.