Bolla

In the Albanian mythology Bolla (also known as Bullar in South Albania), is a type of serpentic dragon (or a demonic dragon-like creature) with a long, coiled, serpentine body, four legs and small wings in ancient Albanian folklore. This dragon sleeps throughout the whole year, only to wake on Saint George's Day, where its faceted silver eyes peer into the world. The Bolla does this until it sees a human. It devours the person, then closes its eyes and sleeps again.