Ok then Relle, you rather tentatively climb on into the mouth! It's not THAT big; you have to crawl around in here and there is little room for manoeuvre.
It is slightly soft underfoot , and the illumination is rather crazy due to the weird angles. You can see the map- it's fine.
You can also see the metal object buried in the 'ceiling' of this place.
Well, Kuylen doesn't seem to have bothered to get the sword. There could be other reasons, sure, but it's something to consider, either way.
Besides, the cloak should be already enough for what we want. We need his dna, there's a good chance it'd be on his cloak, especially if the blood is his.
Do we really need the sword (besides Galder's irrational Kuylen love) ?