this is fine.

just want to point out something interesting from tolkien gateway! i think when their father names are not used, amrod & amras generally go by their epessi instead ("minyo" & "atyo" would be plausible nicknames)

Maglor Feanorian's fingernails dug into Uldor's skin. A poppy bloomed and trickled down his neck.

Uldor struggled for air, trying to catch a breath as the grip around his neck tightened and every inhale sent his lung in a spasm of pain. Blood soaked his garments like ruby dye.

“I don’t think you understand, Easterling,” said Maglor Feanorian, sharply yet effortlessly, melodic voice ringing cold and merciless as ice.

Each syllable sliced into Uldor's consciousness as if it was ripping through his skull. He trembled as the waves of power shook the ground below him, the very rocks crumbling in submission beneath the singer's feet.

Maglor Feanorian leaned in, a certain slyness dotting his tone. “You see, the reason why I am my brother's servant is not because I am weak." He twisted the knife in Uldor's side. Uldor choked out a cry as it burned, digging like fire in his insides. Crimson splattered all over the Feanorian's face, none of which were his own.