What am i becoming

I am changing into something.
I thirst for unknown substance.
I yurn for destruction.
I yurn for power to destroy.
I feed on flesh.
I drink from bones.
I soar with demonic haste.
I tear through with malice.
I fight with hate.
I train with patience.
I win with lust.
I battle for pleasure.
I kill for sport.
I hunt for the thrill.
I stalk for pride.
I kill with greed.
I seek a challenge.
I seek a worthy opponent.
I must fight to maintain myself.
I will destroy to win.
I deceive those who know me best.
I keep pawns to do my bidding.
I have the body of an ancient evil.
I have the claws of rending.
I have teeth of tearing.
I have feet of speed.
I have wings of darkness.
I have a soul darker than hell.
When will I stop.
When will I be beaten.
When will someone destroy me.
What have I become.