Anthony "Black Alien" Loffredo has added a new and gruesome addition to his brutal selection of radical body modifications ...

In his song Don't Let Me Go, MGK alluded to how his blackout tattoos became a way to cope ... a half-sleeve, or a full sleeve ...

Known for having a plethora of tattoos -- including his own ... I'm basically a superhero now" with the blackout piece, his wife said, "It's your body, and I want you to be happy with his." ...