This is terrific writing- the atmosphere is stunningly good, not just the Lossoth encampment but the sensation of being so far North is very convincing. Your characterisation of the Elder is superb- there's a real sense of slightly claustrophobic heat and intensity about that scene , and then so quickly followed by the dogs' sickness and death. Brilliant image of the dogs corpses lying on the ice and Tyelpe's sensation of them running at him. That image will haunt me and I think I will have to come back and read this again several times. This story is so good- original and so well written. Kudos many times.

how much I enjoyed this

Now Telperinquar notices the patterns on the tent’s walls, dark wave-forms shot through with strands of red seaweed, almost hair-like in its feathered length. The motif returns in the intricate beading of the elder’s parka. Her many necklaces are a wealth of varicoloured shells.

Uinen

And the bargaining for harpoon heads. 

And you are uncompromising in your vision- so we see the malformed seals and see the dogs die- I hate the thought of both but it gives credence to the writing.  

I don't want to pause my reading but have to tell you how brilliant your depiction is of Angband- I have never 'explored' it through either reading or writing it  but I think yours has become head canon for me now. Wonderful idea that Morgoth decorates his fortress with scenes of his 'victories' over the House of Feanor, through his father and son. The horrible creepy mutants are really convincing, and weirdly, Sauron makes me feel better because of course they won't attack HIM!! I almost forgot that Tyelpe doesn't know!! And then Sauron/Annatar was looking a the map, and Tyelpe was thinking he must be an architect- oh god! Sauron isn't even really pretending- or barely! He just wants to get there, retrieve whatever it is he KNOWS is there ....sorry. I am babbling! This was truly chilling - firstly because they are going into Angband and every sense and instinct should be screaming at him to get out!!! And then he is going in with flipping Sauron- lieutenant of Morgoth, werewolf extraordinaire!! Probable torturer of Maitimo, persecutor and murderer of Finrod etc etc....oh Tyelpe. What the bloody hell are you doing! 

You see how you are playing me- terrified as we go into Angband, reassured that Sauron will see off any creepy beasties, and then remembering that Sauron is the creepiest beastie and I should be absolutely terrified of him...

GREAT writing!!