Answer:
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see. What am I?
You can see me in water, but I never get wet. What am I?
The 8 of us go forth and not back to protect our king from a foe's attack. What am I?
I get dirty when wiping things clean. What am I?
I sit in a corner while traveling around the world. What am I?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.