Goayr Heddagh

The Goayr Heddagh are from the Manx people from the Isle of Man. They glow with a natural luminescence. They are big scary goats that prey on lone travelers at night, but they will run away if challenged.

Citations:

Rose, Carol. Giants, Monsters, and Dragons: An Encyclopedia of Folklore, Legend, and Myth. United Kingdom, Norton, 2001.