Answer:
I am a type of weapon for SCI-FI characters
Ten men's strength, ten men's length. Ten men can't break me, yet a young boy walks off with me. What am I?
Only one color, but not one size. Stuck at the bottom, yet easily flies. Present in sun, but not in rain; doing no harm, and feeling no pain. What am I?
What has keys but no locks a space but no room and you can enter but can't go in?
In wealth I abound; in water I stand; as a fencer I'm valued all over the land; at Venice I'm famous; by farmers I'm prized; respected by law yet huntsmen despised; consternation and ruin ensue when I break; And the beasts of the forest advantage won't take.
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.