[Urwen]

Okay, I now think I can explain the riddle. Or at least some parts of it.



The oldest one, the nameless one,
Did not know warmth of shining sun.
But in the darkness shone the stars,
And in their light, from countries far
The Second came in second's turn -
But, in the end, though day was won,
Who twice had torched, third time must burn. - Feanor

But better known in tale of years
The younger sisters - one for tears,
And one for joy, resounding joy
Which yet failed darkness to destroy;
But peace was guarded well, until
Twixt triumph great and ruin great -
But stopping short of western hills -
A burst reversed the tides of fate,
Breaking resistance, kindling dread, - Dagor Bragollach
Incinerating every shred
Of estel in the lord now dead
Whose line was estel to beget. - Fingolfin

I'm not the least, but I'm the last.
The closing rage of hardships past,
Of foes and heroes both long gone.
You cannot count us on one hand -
Though brief our line, 'tis yet too long,
And we destroyed our motherland. - Orcs, who destroyed Beleriand
I am the end. I am the start.
I split the thread of time apart.