Unlike other figures in the series who wield overt magical abilities, Cooper’s Ganieda is characterized by a "subtle, yet undeniable power".
“He already has,” Morgaine said flatly. She lifted the broken sword. Caliburn—before it was Excalibur. Its blade was cracked, leaking a faint silver light like liquid mercury. “He came as a counselor. Told Arthur—who is still a boy here, hiding from his uncle—that mercy is weakness. That a true king builds on fear. He nearly convinced him.”
The battle was brutal. Brett helped carry wounded. Morgaine sang a song that turned the tide—not magic, but memory , calling the old gods of the soil to rise in mist and confusion.
It's possible that you may be confusing Brett Cooper with another person or mixing up information. If you could provide more context or clarify what you mean by "Brett Cooper" in relation to The Pendragon Cycle, I'd be happy to try and assist you further.
Brett smiled. And for the next two days, he told stories—not of battles, but of loyalty. Of Bobby choosing compassion over victory. Of Loor’s stubborn hope. Of Gunny’s quiet courage.