Answer:
A single syllable do I claim black was my most famous name; Fetal to mortals here below thousands have I slain in a single blow.
What is seen in the middle of March and April that cannot be seen at the beginning or end of either month?
I am gentle enough to soothe your skin light enough to fly in the sky and strong enough to crack rocks.
I cut through evil like a double edged sword and chaos flees at my approach. Balance I single-handedly upraise through battles fought with heart and mind instead of with my gaze.
I have married many women but have never been married. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.