Answer:
What is at the end of every rainbow?
What is it that given one, you'll have either two or none?
This heavy and ancient suit was not worn with a tie, but was always worn in battle.
It speaks without a tongue, and listens without ears.
What has many keys but cannot open a single lock or door?
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.