There seemed to be a few themes here - Karina as devil, Karina as creation, but McGurty's Karina had a bit of tragedy in it, reminded me of The Ring (Japanese version only thanks!), seemed most well-suited for inclusion in a wide variety of campaigns, and had that absolute howler of a final line that I used in the subject. Very Weird all around. :D
The PDF with all the Karinas is here.
The previous contest PDFs are here: Magic Items and Spells.