Cockatrice

The cockatrice is often described as a two-legged dragon with the head of a rooster. In some tales they possess the ability to kill with their stare, breath or touch. They are said to be the product of an egg laid by a hen, hatched by toads and or snakes. If a cockatrice looks at it's own reflection or hears the crow of a rooster, it will die.

Source
The cockatrice originates from british folklore, dating back to around 1180 AD.

Media
Cockatrices appear in the following media:

Games

 * Gems of War
 * The Witcher and The Witcher III - Wild Hunt
 * Ziggurat
 * The Witcher and The Witcher III - Wild Hunt
 * Ziggurat
 * The Witcher and The Witcher III - Wild Hunt
 * Ziggurat
 * Ziggurat

Novels

 * Berserk