An eloquent and thoughtful scribe I may aspire,
but coming up with my own riddle causes me to tire.
Hopefully you will find this neither too easy nor hard,
But in either case, go easy on this tired bard
I move quieter than a mouse
Yet can obscure a whole house.
Some may try to get me to stay,
But always I slip away.
Usually I hide the pale face on high,
but at times even the orb in the sky.
Probe my depths with a light so bright,
And your eyes will probably lose all sight.
Now the hounds are nigh,
Can you answer, "who am I?"