Answer:
Name for zenith
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
Dies half its life. Lives the rest. Dances without music. Breathes without breath.
You can tumble in it, roll in it, burn it, animal eat it. Used to cover floors, still used beyond stall doors. Freshens whatever it is placed on. Absorbs whatever is poured into it.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?