Norse Riddles

(Written for Patri ibn Cariadoc)

The snake with one wing and forty legs
Sheds its scales on the sand.

Because I was overlooked
One who could
Gave me to one who could not
To use as he did not intend.

My sting is in my tail.
I only bite when I have shed my skin.
What snake am I?

I was a hostage for him
Who being brave broke faith;
Now I and my twin brother are parted forever.
Who am I?

Two men I bound to their deaths
Yet would not for a third a weapon make.
Who am I?

I am the cup still full, though the hall drink me dry.
I weave the web no sword can cut, no shield deny.
I am the treasure and tale of its taking.
I am the longest lived of all man's making.