Riddles, for the Library Options

[stargate525]

We in the building thread have decided that for some hidden elements of the library, the password will be in the form of a riddle. Now I thought this would be a good way to get new riddles and have some fun too. My first five; see if you can figure them out and tell me if they are too easy.

Blade without pommel, hilt, or edge.
Warriors trample,
Alchemists prize.
Enormous in number, not size.

Has legs but does not walk,
has a back without a spine.
sometimes wood, sometimes stone,
often arranged in a line.

It burns without fire,
lights without heat.
Ever rising, ever lowering,
the perfect lamp ever designed.

Weapons like daggers,
armor like mail.
Your death is its breath,
but on a beach it will die.

lowers mountains, widens streams, destroys towns.
no wall can stop it, no man can dodge it.
It waits on no one, but slows for those expectant.



please feel free to contribute.

[vaanic~one]

I've worked out number four. But I must say, last time that it was presented to a group of people, no-one managed to work out what it was, so it must be hard.

I have a contribution:

From the beginning of eternity,
To the end of time and space,
To the beginning of every end,
And the end of every place...

I think it may be a little too easy though.