Answer:
I have an eye but cannot see. I am fast but I have no limbs. What am I?
The eight of us go forth not back to protect our king from a foe's attack. What are we?
I like to twirl my body but keep my head up high. After I go in, everything becomes tight. What am I?
I'm a precious stone in a pack of cards. What am I?
I cover what's real; hide what is true, but sometimes bring out the courage in you. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.