According to the Welsh Mabinogion, Blodeuwedd was created out of flowers by the magicians Gwydion and Math, as a wife for Lleu Llaw Gyffes. However, she fell in love with Gronw Pebr, and together they managed to kill Lleu so that they could live together. However, Lleu did not really die, but he got changed into an eagle. He was restored in human form again by Gwydion, and then killed Gronw. Then Gwydion cursed Blodeuwedd by changing her into an owl.Sounds like a twisted love story, but there's much more to it (lots of symbolism) and it is also a small part of a larger story. But I leave it to the interested folks to search that out for themselves.