How could you...?

How could you...brother?
How could you let the darkness take hold of yourself?
How could you push your knife so brutaly into my chest?
The blood flows, my pain grows.
Slowly, unpleasant hate fulfill my soul.
You've already lost your warmth and humanity.
You are no longer my beloved older brother,
but a power seeking demon.
Tell me, how could you go so far
and tear my life into meaningless pieces?
Brother....HOW COULD YOU?!