Yes. But that's the second out of the three challenges... Dark Mind, Dark Meta Knight... Go with Tazz. They can help you. DM has very powerful domination abilities, among others. And DMK... he's quite versatile. *slips the Barrier Ring on*

Nightmare:Let us be off. *NIGHTMARE and SIVELOS return to BAAL.*

Great Tyrant Overlord, I have returned. My mind is now impenetrable.

Nightmare: This I can guarantee. I am a Dark Deity of the Mind, and I cannot penetrate his mental defenses.