The Monster within (poem)

this is my poem from poetry.com

You have nothing to fear,
there are no thunder rumbles to hear,
we walk among the living,
we are the undead creatures that are breathing,
our destination has been selected,
so many things we have resented,
memories may never fade,
we walk the earth at night not day,
we will never serender to the fight,
let me have just one bite,
the rich blood coming from you vains,
the blood on your shirt stained,
guess this riddle and you will see,
what monster that has become of me,
a blood-thirsty vampire sucking out your life,
teeth cutting into you like knives,
this undead creature will never die.