[Nerwen]

Explanation:

My lord, what seek you here? You should repent.
I told you once, I told you twice, I told you thrice. -"The way is shut," said three times.

Do you not know overindulgence is a vice?
You act 'gainst common sense and my advice. -"A rash vow he spoke, as he drained the horn at that feast..."

The world isn't ready for the task that you attempt, -"It was made by those who are Dead, and the Dead keep it, until the time comes."

And none will know what came of you after you went. -"Baldor, son of Brego, passed the Door and was never seen among men again."

Stone I am not, to stone I draw, -"...he was withered as an old stone. Indeed for stone they took him..."

And stone is stronger than your arms. "... before him stood a stony door closed fast: his finger-bones were clawing at the cracks. A notched and broken sword lay by him, as if he had hewn at the rock in his last despair."