Cryptopsy

Apprenticeship to my duty
Learner of a higher magnitude
A scholar at producing pain
Don't forget to include
A masters in brutality
Enjoy to be, my next fatality
Some call me a fiend
A ghoul of gore
I'm gonna settle the score
You lecherous, squabbling mongrel
Have you suffered enough?
Bled all over yourself?
It's a shame to see you spill
All that rotting swill
Seemed as though you've delved
Into an unwelcoming predicament
Enough to wipe that smile
Off your shitgrin face
Beaten down dog
Pungent urine stench