This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Indrik (Russian)
In Russian folklore, the Indrik is a fabulous beast, the king of all animals, who lives on a mountain known as "The Holy Mountain" where no other foot may tread. When it stirs, the Earth trembles. The word "Indrik" is a distorted version of the ‘edinorog’, Russian word for unicorn. It is described as a gigantic bull with legs of a deer, the head of a horse and an enormous horn in its snout, making it vaguely similar to a rhinoceros.
Descriptions of it vary somewhat: some say it is a deer-like creature with the head of a horse, a horn like a unicorn and feathers on its body, while others describe it as a gigantic bull with the legs of a deer, a horse’s head and a snout like a rhino, on the end of which is the horn.