Black cloak with orange edges, white feather-like extensions and red locks
Black dress with purple markings
Belt with red swirl symbol in the front
Metal headband with purple gem
Skills, powers and abilities
Enhanced powers and skills
Enhanced magical skills
Impenetrable barrier conjuration
The Dark Queen (黄泉の女王,Yomi no joō?, lit. Queen of the underworld)
is featured as the final boss in Sonic and the Black Knight. The Dark Queen is Merlina transformed into a witch-like form with the dark power of the Scabbard of Excalibur, but in battle, she appears as a ghostly version of King Arthur equipped with an eye on its chest, two giant swords greatly representing the sword used in the battle against King Arthur, and dozens of arms.
The battle resembles the final boss in Sonic and the Secret Rings since both are played in a different dimension and both introduce a new transformation for Sonic (Darkspine Sonic in Sonic and the Secret Rings and Excalibur Sonic in Sonic and The Black Knight). The objective you need to proceed to beat her is to flick the Wii Remote when one is shown on the screen to power up Sonic's Soul Gauge, then after slashing her multiple times, it will show her slightly dissolving, emitting dark energy, and then the screen will feature the Final Cutscene and Credits.
The Dark Queen is the only villain who doesn't wish to destroy or rule over everything. In fact, her goal is the opposite, since she wants the story's world to last forever.
A similar final boss appeared in one of the Mario Games. The Shadow Queen, final boss of Paper Mario: The Thousand Year Door, is similar to the Dark Queen. Both have control over magic, both have a similar name, as shadow and dark are almost the same thing. Both are at first invincible and both are weakened by ancient artifacts.
The Dark Queen's role is similar to Morgan Le Fay, the antagonist of the novel King Arthur. While Sonic's similarity role is King Arthur.
She is the first female antagonist and final boss that Sonic faces.
There is a way to defeat the Dark Queen in very little time. As perfect hits are dealt, the soul gauge will keep filling, up to a point where a second will fill on top of the first. If the second gauge gets maxed out, the player will win automatically.
If the player defeats her with 5 Mastery Stars, the player will obtain a profile of Merlina.
When telling Sonic her intention to make the kingdom that last forever, she summons a yellow carnation. A yellow carnation means disappointment or dejection. This implies her disappointment with either: 1. Sonic not aproving of her desire 2. Her sorrow to her world ending 3. refusing to let her world end.