A malevolent horse invented from scratch

The March Malaen is a folklore creature wrongly presented as a malevolent horse associated with witchcraft. This figure was forged from 1807 by Iolo Morganwg within the Welsh Triads, before being integrated into translations such as that of the Mabinogion by Joseph Loth in 1889. Modern analysis shows that it is a textual confusion with the people of the Corannyeit from the tale of Lludd a Llefelys.