Unicorn

From Hpwiki

A unicorn is a horse-like creature with a single horn on its forehead, pointing forward and upward. Adult unicorns are white, the colour of innocence and goodness (in the Western culture, while the same colour in the Chinese culture symbolizes sorrow.) Foals are initially golden; they turn silver at the age of two and grow fully white before achieving maturity at the age of seven. The horn grows in their fourth year, while the hooves always remain golden. Unicorns consist of magical power from top to bottom. The horn, the hairs, everything in a unicorn's body bears magic. But they cannot use these powers by themselves. In fact, unicorns are weak and need protection against all the greed that wants to destroy them.