Answer:
What has 3 feet but cannot walk?
What can touch someone once and last them a life time?
It is sometimes known to have silver linings.
It holds most knowledge that has ever been said. But is not the brain, is not the head. To feathers and their masters, it's both bane and boonΒ One empty, and one full.
Slayer of regrets, old and new, sought by many, found by few.
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.