Answer:
I am the noise Santa's reindeers make
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?
I go up and down at the same time. Up towards to sky and down towards the ground
I have an eye but cannot see. I take time to generate and can dissipate in seconds. What am I?
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.
The answer I give is yes, but what I mean is no. What was the question?