The Black Rat

One unaware black rat, Who I am going to swat. Time will come, Time will tell. I thy monster. My forces shivering in my heart's altar. You have breached the trust, And to wipe you out is a must. No matter how you are austere, My punishment will be severe. And neither will be spared, And you had once been bewared. Breached you have devils chains, I am swift & absolute, nothing will go in vain!