This card was made Rank 6 as a reference to "Dark Magician Girl" being Level 6. This also allows "Dark Magician Girl" to be used as Xyz Material for this card.
This card could be also a female counterpart to "Sorcerer of Dark Magic", as they both need Level 6 Spellcaster-Type monsters for their summon, and they are the strongest variations of their base forms, respectively "Dark Magician Girl" and "Dark Magician".
This card's artwork is based on the anniversary artwork of "Dark Magician" both of which were drawn by Kazuki Takahashi.
In both works, Takahashi redraws the iconic monsters with darker colors and outfits. He also uses a more realistic, flesh-like style.
According to the Duel Art artbook by Kazuki Takahashi, this art was originally intended to be simply another "Dark Magician Girl" art to act as a female counterpart to the anniversary art of "Dark Magician." It was later made into a new Xyz Monster.
The letters that appear in the circle are Cyrillic.
An ankh (a symbol of revival) is on her chest, very possibly referring to the second effect of this card.