This card's name is a reference to Darth Vader's title as "Dark Lord of the Sith," lady being the feminine equivalent of the lord title.
This card's Japanese name is a reference to the musical Wicked, in which the Witch's name is Elphaba.
This card's left arm appears in the artwork of "Kozmojo", and an unmasked version of her appears in the artwork of "Kozmourning".
In the artwork of "Kozmourning", "Kozmo Farmgirl" appears to be grieving over her death. Because it is an allusion to the death of Darth Vader (who was revealed to be Luke Skywalker's father), it is possible "Dark Lady" could be related to "Farmgirl".