The Dark Hollow is the thirteenth and final stage of Sonic and the Black Knight for the Wii. This stage has just a single mission - the last boss fight against the Dark Queen as Excalibur Sonic.
||You would not understand, nor could you understand. That is why I must do what I must do. I am finished with you.
— Merlina, to Sonic
The area repesents Camelot Castle at the epicentre of Merlina's black magic vortex: the cheerful medieval city transformed into a brooding, crown-shaped fortress. After Nimue's magical barrier fails to contain Merlina's stasis enchantment, Sonic and Caliburn return to the twisted ruins of the castle in a last-ditch effort to stop the sorceress. The wizard has installed herself in a new throne room, inscribed with her flower-shaped symbol, when Sonic and Caliburn confront her. Merlina's exposition reveals that her intentions are much more admirable (if misguided) than the typical genocide-and-dominion Sonic villain. According to the wizard, Grand Kingdom is doomed to a fate of civil war and destruction - and Merlina would rather see the world eternally frozen than watch her beloved nation and her grandfather's dream collapse.
Sonic, nonetheless, refuses to sympathize with his former friend's motives, and attacks. Things do not go well to begin with. Sonic is brushed aside like a fly, and Merlina snaps Caliburn in half for good measure. Observing through Nimue's scrying pool, the Knights of the Round Table exhort Sonic to flee, but the hedgehog refuses to give up. Fueled by his determination, Caliburn transforms into Excalibur, strongest of the Sacred Swords; and in turn, Sonic is transformed into Excalibur Sonic.
- Defeat the Boss: Dark Queen - 300 followers