Quoth the raven, `Nevermore.' And the raven, never flitting, still is sitting, still is sitting On the pallid bust of Pallas just above my chamber door; And his eyes have all the seeming of a demon's that is dreaming - Edgar Allan Poe
The Kelpie is a supernatural water horse from Celtic folklore. They tend to be malevolent in nature. They are able to transform (usually into beautiful women) and lure victims into the water to drown them.