It truly is one, as its title suggests. I'm saying "it" because this thing is so monstrous it's hard to tell if it's supposed to be male or female. Of course, with the lack of breasts, you're going to have to assume it's male. I love how this creature has a sort of third arm coming out of him. It looks like a symbiote from Marvel Comics, with how grotesque it is. Speaking of Marvel Comics, it's too bad they already have a character called Abomination, because that would be a perfect name for this guy.
This could have probably used some color, but it doesn't matter because it's so nicely done. I like how the gums are exposed, which give it a somewhat blue appearance. Your artwork reminds me of the stuff made by theonewithoutaname. I guess dark, detailed stuff can come off as similar. I think he's actually lacking an arm on one of his sides and it's just two arms on the same side.